我想以编程方式将 5 个按钮放置在屏幕上。
我希望它们在 View 底部上方 17 像素，每个按钮之间有 20 像素的空间。
我是这样做的:
let button1 = UIButton(frame: CGRectMake(20, 48, 50, 50))
button1.setImage(UIImage(named: "button1"), forState: .Normal)
let button2 = UIButton(frame: CGRectMake(91, 48, 50, 50))
button2.setImage(UIImage(named: "button2"), forState: .Normal)
let button3 = UIButton(frame: CGRectMake(162, 48, 50, 50))
button3.setImage(UIImage(named: "button3"), forState: .Normal)
let button4 = UIButton(frame: CGRectMake(233, 48, 50, 50))
button4.setImage(UIImage(named: "button4"), forState: .Normal)
let button5 = UIButton(frame: CGRectMake(304, 48, 50, 50))
button5.setImage(UIImage(named: "button5"), forState: .Normal)
self.addSubview(button1)
self.addSubview(button2)
self.addSubview(button3)
self.addSubview(button4)
self.addSubview(button5)
我工作得很好，正是我想要的!但只是在 iPhone 6s 屏幕尺寸上，所以我想让它在所有屏幕尺寸上工作的方法是使用约束，问题是我不知道如何以编程方式添加约束。
有人可以帮我吗？
谢谢!
SaintThread 回答，记录错误:
Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d968a10 h=--& v=--& UIButton:0x79729670.midX == + 45>",
"<NSLayoutConstraint:0x79725610 H:|-(48)-[UIButton:0x79729670] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>",
"<NSLayoutConstraint:0x797255e0 H:[UIButton:0x79729670(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797255e0 H:[UIButton:0x79729670(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.305 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d968a10 h=--& v=--& UIButton:0x79729670.midX == + 45>",
"<NSLayoutConstraint:0x79725610 H:|-(48)-[UIButton:0x79729670] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725610 H:|-(48)-[UIButton:0x79729670] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.305 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3c0 h=--& v=--& UIButton:0x79729670.midY == + 73>",
"<NSLayoutConstraint:0x79725c50 V:|-(20)-[UIButton:0x79729670] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>",
"<NSLayoutConstraint:0x79725ad0 V:[UIButton:0x79729670(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725ad0 V:[UIButton:0x79729670(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.306 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3c0 h=--& v=--& UIButton:0x79729670.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3f0 h=--& v=--& V:[UIButton:0x79729670(50)]>",
"<NSLayoutConstraint:0x79725c50 V:|-(20)-[UIButton:0x79729670] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725c50 V:|-(20)-[UIButton:0x79729670] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.306 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7a991c60 h=--& v=--& UIButton:0x79729080.midX == + 116>",
"<NSLayoutConstraint:0x79725560 H:|-(48)-[UIButton:0x79729080] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>",
"<NSLayoutConstraint:0x79725510 H:[UIButton:0x79729080(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725510 H:[UIButton:0x79729080(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.306 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7a991c60 h=--& v=--& UIButton:0x79729080.midX == + 116>",
"<NSAutoresizingMaskLayoutConstraint:0x7a991c90 h=--& v=--& H:[UIButton:0x79729080(50)]>",
"<NSLayoutConstraint:0x79725560 H:|-(48)-[UIButton:0x79729080] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725560 H:|-(48)-[UIButton:0x79729080] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.307 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3c0 h=--& v=--& UIButton:0x79729670.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3f0 h=--& v=--& V:[UIButton:0x79729670(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7a991cc0 h=--& v=--& UIButton:0x79729080.midY == + 73>",
"<NSLayoutConstraint:0x79725a10 V:[UIButton:0x79729670]-(20)-[UIButton:0x79729080]>",
"<NSLayoutConstraint:0x797259e0 V:[UIButton:0x79729080(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797259e0 V:[UIButton:0x79729080(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.307 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3c0 h=--& v=--& UIButton:0x79729670.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96a3f0 h=--& v=--& V:[UIButton:0x79729670(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7a991cc0 h=--& v=--& UIButton:0x79729080.midY == + 73>",
"<NSLayoutConstraint:0x79725a10 V:[UIButton:0x79729670]-(20)-[UIButton:0x79729080]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725a10 V:[UIButton:0x79729670]-(20)-[UIButton:0x79729080]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.307 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96b720 h=--& v=--& UIButton:0x79728480.midX == + 187>",
"<NSLayoutConstraint:0x79725490 H:|-(48)-[UIButton:0x79728480] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>",
"<NSLayoutConstraint:0x79725440 H:[UIButton:0x79728480(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725440 H:[UIButton:0x79728480(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.308 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96b720 h=--& v=--& UIButton:0x79728480.midX == + 187>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96b750 h=--& v=--& H:[UIButton:0x79728480(50)]>",
"<NSLayoutConstraint:0x79725490 H:|-(48)-[UIButton:0x79728480] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725490 H:|-(48)-[UIButton:0x79728480] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.308 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7a991cc0 h=--& v=--& UIButton:0x79729080.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7a991cf0 h=--& v=--& V:[UIButton:0x79729080(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96c260 h=--& v=--& UIButton:0x79728480.midY == + 73>",
"<NSLayoutConstraint:0x797259b0 V:[UIButton:0x79729080]-(20)-[UIButton:0x79728480]>",
"<NSLayoutConstraint:0x79725980 V:[UIButton:0x79728480(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725980 V:[UIButton:0x79728480(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.308 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7a991cc0 h=--& v=--& UIButton:0x79729080.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7a991cf0 h=--& v=--& V:[UIButton:0x79729080(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96c260 h=--& v=--& UIButton:0x79728480.midY == + 73>",
"<NSLayoutConstraint:0x797259b0 V:[UIButton:0x79729080]-(20)-[UIButton:0x79728480]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797259b0 V:[UIButton:0x79729080]-(20)-[UIButton:0x79728480]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.309 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7aad76b0 h=--& v=--& UIButton:0x79727bc0.midX == + 258>",
"<NSLayoutConstraint:0x797253b0 H:|-(48)-[UIButton:0x79727bc0] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>",
"<NSLayoutConstraint:0x79725380 H:[UIButton:0x79727bc0(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725380 H:[UIButton:0x79727bc0(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.309 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7aad76b0 h=--& v=--& UIButton:0x79727bc0.midX == + 258>",
"<NSAutoresizingMaskLayoutConstraint:0x7aad76e0 h=--& v=--& H:[UIButton:0x79727bc0(50)]>",
"<NSLayoutConstraint:0x797253b0 H:|-(48)-[UIButton:0x79727bc0] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797253b0 H:|-(48)-[UIButton:0x79727bc0] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.309 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96c260 h=--& v=--& UIButton:0x79728480.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96c290 h=--& v=--& V:[UIButton:0x79728480(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7aad7710 h=--& v=--& UIButton:0x79727bc0.midY == + 73>",
"<NSLayoutConstraint:0x79725950 V:[UIButton:0x79728480]-(20)-[UIButton:0x79727bc0]>",
"<NSLayoutConstraint:0x79725920 V:[UIButton:0x79727bc0(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725920 V:[UIButton:0x79727bc0(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.309 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7d96c260 h=--& v=--& UIButton:0x79728480.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7d96c290 h=--& v=--& V:[UIButton:0x79728480(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7aad7710 h=--& v=--& UIButton:0x79727bc0.midY == + 73>",
"<NSLayoutConstraint:0x79725950 V:[UIButton:0x79728480]-(20)-[UIButton:0x79727bc0]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725950 V:[UIButton:0x79728480]-(20)-[UIButton:0x79727bc0]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.310 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7a993980 h=--& v=--& UIButton:0x797270c0.midX == + 329>",
"<NSLayoutConstraint:0x797252e0 H:|-(48)-[UIButton:0x797270c0] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>",
"<NSLayoutConstraint:0x79725290 H:[UIButton:0x797270c0(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x79725290 H:[UIButton:0x797270c0(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.310 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7a993980 h=--& v=--& UIButton:0x797270c0.midX == + 329>",
"<NSAutoresizingMaskLayoutConstraint:0x7a9939b0 h=--& v=--& H:[UIButton:0x797270c0(50)]>",
"<NSLayoutConstraint:0x797252e0 H:|-(48)-[UIButton:0x797270c0] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797252e0 H:|-(48)-[UIButton:0x797270c0] (Names: '|':Arounder.CategoriesBarView:0x797c7190 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.310 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7aad7710 h=--& v=--& UIButton:0x79727bc0.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7aad7a50 h=--& v=--& V:[UIButton:0x79727bc0(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7a993510 h=--& v=--& UIButton:0x797270c0.midY == + 73>",
"<NSLayoutConstraint:0x797258d0 V:[UIButton:0x79727bc0]-(20)-[UIButton:0x797270c0]>",
"<NSLayoutConstraint:0x797258a0 V:[UIButton:0x797270c0(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797258a0 V:[UIButton:0x797270c0(50)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2016-08-17 12:49:14.311 Arounder[3992:10988727] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x7aad7710 h=--& v=--& UIButton:0x79727bc0.midY == + 73>",
"<NSAutoresizingMaskLayoutConstraint:0x7aad7a50 h=--& v=--& V:[UIButton:0x79727bc0(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7a993510 h=--& v=--& UIButton:0x797270c0.midY == + 73>",
"<NSLayoutConstraint:0x797258d0 V:[UIButton:0x79727bc0]-(20)-[UIButton:0x797270c0]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x797258d0 V:[UIButton:0x79727bc0]-(20)-[UIButton:0x797270c0]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
最佳答案
iOS 8 安全
添加按钮查看之前
button1.translatesAutoresizingMaskIntoConstraints = false
button2.translatesAutoresizingMaskIntoConstraints = false
button3.translatesAutoresizingMaskIntoConstraints = false
button4.translatesAutoresizingMaskIntoConstraints = false
button5.translatesAutoresizingMaskIntoConstraints = false
添加按钮后查看
let views = ["button1": button1,
"button2": button2,
"button3": button3,
"button4": button4,
"button5": button5]
let buttonConstraintsH = NSLayoutConstraint.constraintsWithVisualFormat(
"H:|-20-[button1]-20-[button2]-20-[button3]-20-[button4]-20-[button5]-20-|",
options: [],
metrics: nil,
views: views)
let button1ConstraintsV = NSLayoutConstraint.constraintsWithVisualFormat(
"V:[button1]-17-|",
options: [],
metrics: nil,
views: views)
let button2ConstraintsV = NSLayoutConstraint.constraintsWithVisualFormat(
"V:[button2]-17-|",
options: [],
metrics: nil,
views: views)
let button3ConstraintsV = NSLayoutConstraint.constraintsWithVisualFormat(
"V:[button3]-17-|",
options: [],
metrics: nil,
views: views)
let button4ConstraintsV = NSLayoutConstraint.constraintsWithVisualFormat(
"V:[button4]-17-|",
options: [],
metrics: nil,
views: views)
let button5ConstraintsV = NSLayoutConstraint.constraintsWithVisualFormat(
"V:[button5]-17-|",
options: [],
metrics: nil,
views: views)
NSLayoutConstraint.activateConstraints([buttonConstraintsH, button1ConstraintsV, button2ConstraintsV, button3ConstraintsV, button4ConstraintsV, button5ConstraintsV])
并具有相同的比例(为每个按钮写下):
NSLayoutConstraint.activateConstraints(NSLayoutConstraint(
item:button1
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:button1
attribute:NSLayoutAttributeWidth
multiplier:1
constant:0))
关于ios - 以编程方式添加约束，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38992560/