我目前正在使用 Xcode 7.3,我只是想知道如何跨不同的 UIView 选择多个按钮,但在单个 View Controller 下。 CMD 点击似乎不起作用。我需要此功能,因为在 Xcode 7.3 中,让 IB 上的两个按钮共享相同操作的唯一方法是一次选择它们,然后将操作拖动到 View Controller 。我是通过代码来做的,没有拖放
class LogIn: UIViewController {
var mail_tf : UITextField!
var pass_tf : UITextField!
var btnL : UIButton!
var btnC : UIButton!
let cl1 = UIColor (red: 255/255.0, green: 258/255.0, blue: 196/255.0, alpha: 1)
let cl2 = UIColor (red: 238/255.0, green: 233/255.0, blue: 191/255.0, alpha: 1)
override func loadView() {
super.loadView()
let backgroundView = UIImageView(image: UIImage(named: "4")!)
//backgroundView.layer.cornerRadius = backgroundView.frame.size.width / 2
backgroundView.frame = CGRectMake(0, 0, 900, 900)
//backgroundView.clipsToBounds = true
//backgroundView.layer.borderColor = UIColor.whiteColor().CGColor
// backgroundView.layer.borderWidth = 1
self.view.addSubview(backgroundView)
mail_tf = UITextField()
mail_tf.frame = CGRectMake(95, 90, 190, 60)
mail_tf.layer.cornerRadius = 10
mail_tf.layer.borderWidth = 1
mail_tf.layer.borderColor = UIColor.blackColor().CGColor
mail_tf.placeholder = "e-mail"
mail_tf.textColor = UIColor.redColor()
mail_tf.backgroundColor = cl1
mail_tf.borderStyle = UITextBorderStyle.RoundedRect
self.view.addSubview(mail_tf)
pass_tf = UITextField()
pass_tf.frame = CGRectMake(95, 190, 190, 60)
pass_tf.layer.cornerRadius = 10
pass_tf.layer.borderWidth = 1
pass_tf.layer.borderColor = UIColor.blackColor().CGColor
pass_tf.placeholder = "password"
pass_tf.secureTextEntry = true
pass_tf.textColor = UIColor.redColor()
pass_tf.backgroundColor = cl1
pass_tf.borderStyle = UITextBorderStyle.RoundedRect
self.view.addSubview(pass_tf)
btnL = UIButton()
btnL.frame = CGRectMake(195, 260, 90, 40)
btnL.setTitle("Log In ", forState: UIControlState.Normal)
btnL.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
btnL.layer.borderWidth = 1
btnL.layer.borderColor = UIColor.blackColor().CGColor
btnL.layer.cornerRadius = 10
btnL.backgroundColor = cl1
self.view.addSubview(btnL)
btnL.addTarget(self , action: #selector(self.action(_:)), forControlEvents: UIControlEvents.TouchUpInside)
btnC = UIButton()
btnC.frame = CGRectMake(228, 350, 150, 40)
btnC.setTitle("Create new account ", forState: UIControlState.Normal)
btnC.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
btnC.layer.borderWidth = 1
btnC.layer.borderColor = UIColor.blackColor().CGColor
btnC.layer.cornerRadius = 10
btnC.backgroundColor = cl1
self.view.addSubview(btnC)
btnC.addTarget(self , action: #selector(self.action(_:)), forControlEvents: UIControlEvents.TouchUpInside)
}
func action (sender: UIButton!) {
// btnL & btnC open the Logged_in file . there is the problem
let vc = Logged_In()
let navigation = UINavigationController(rootViewController:vc)
self.navigationController?.presentViewController(navigation, animated: true, completion: nil)
let vc1 = create()
let navigation1 = UINavigationController(rootViewController:vc1)
self.navigationController?.presentViewController(navigation1, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.title = "Log in"
self.navigationController?.navigationBar.barTintColor = UIColor.blackColor()
self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: cl1]
}
}
最佳答案
编辑后的答案:
好的,我想我现在明白你在问什么了。您希望相同的函数 action(sender: UIButton)
根据调用它的按钮执行不同的操作。
您实际上可以设置一个名为tag
的变量,并设置一个数字使其唯一。例如 btnL.tag = 0
和 btnC.tag = 1
那么您的函数 action
将如下所示:
func action (sender: UIButton!) {
if sender.tag == 0 {
let vc = Logged_In()
let navigation = UINavigationController(rootViewController:vc)
self.navigationController?.presentViewController(navigation, animated: true, completion: nil)
} else if sender.tag == 1 {
let vc1 = create()
let navigation1 = UINavigationController(rootViewController:vc1)
self.navigationController?.presentViewController(navigation1, animated: true, completion: nil)
}
}
UIButton 有一个函数可以做到这一点,特别是:
public func addTarget(target: AnyObject?, action: Selector, forControlEvents controlEvents: UIControlEvents)
按钮需要像这样声明:@IBOutlet var button: UIButton
在类之上。
要添加一个 Action ,我们在您的类 (viewController) 中调用上述函数,该函数可以访问变量按钮:
button.addTarget(self, action: #selector(self.sender(_:)), forControlEvents: .TouchDown)
您需要为每个 UIButton 重复此操作,但选择器函数将完全相同(ei、button1.addTarget(...)、button2.addTarget(...) 等)。
你的函数看起来像这样:
func sender(sender: UIButton) { }
关于swift - 如何通过代码而不是拖放将 Storyboard中的多个按钮连接到一个 Action ?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39087028/