我正在尝试显示包含用户帐户详细信息的 View 。作为 iOS 开发的新手，以下代码应该可以工作(基于文档和搜索)。然而，应用程序崩溃了，我收到一条错误消息，指出无法识别的选择器:
2012-03-13 16:32:25.616 UrbanAgendaApp[4993:207] Displaying profile view
2012-03-13 16:32:25.635 UrbanAgendaApp[4993:207] -[UAFirstViewController presentViewController:animated:completion:]: unrecognized selector sent to instance 0x4b45240
2012-03-13 16:32:25.674 UrbanAgendaApp[4993:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UAFirstViewController presentViewController:animated:completion:]: unrecognized selector sent to instance 0x4b45240'
*** Call stack at first throw:
(
0 CoreFoundation 0x00fbabe9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0110f5c2 objc_exception_throw + 47
2 CoreFoundation 0x00fbc6fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x00f2c366 ___forwarding___ + 966
4 CoreFoundation 0x00f2bf22 _CF_forwarding_prep_0 + 50
5 UrbanAgendaApp 0x00002308 -[UAFirstViewController showProfileView] + 168
6 UrbanAgendaApp 0x00002254 -[UAFirstViewController myUaBtnTouch:] + 52
7 UIKit 0x00014a6e -[UIApplication sendAction:to:from:forEvent:] + 119
8 UIKit 0x000a31b5 -[UIControl sendAction:to:forEvent:] + 67
9 UIKit 0x000a5647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
10 UIKit 0x000a41f4 -[UIControl touchesEnded:withEvent:] + 458
11 UIKit 0x000390d1 -[UIWindow _sendTouchesForEvent:] + 567
12 UIKit 0x0001a37a -[UIApplication sendEvent:] + 447
13 UIKit 0x0001f732 _UIApplicationHandleEvent + 7576
14 GraphicsServices 0x00cbea36 PurpleEventCallback + 1550
15 CoreFoundation 0x00f9c064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
16 CoreFoundation 0x00efc6f7 __CFRunLoopDoSource1 + 215
17 CoreFoundation 0x00ef9983 __CFRunLoopRun + 979
18 CoreFoundation 0x00ef9240 CFRunLoopRunSpecific + 208
19 CoreFoundation 0x00ef9161 CFRunLoopRunInMode + 97
20 GraphicsServices 0x00cbd268 GSEventRunModal + 217
21 GraphicsServices 0x00cbd32d GSEventRun + 115
22 UIKit 0x0002342e UIApplicationMain + 1160
23 UrbanAgendaApp 0x00001c2a main + 170
24 UrbanAgendaApp 0x00001b75 start + 53
25 ??? 0x00000001 0x0 + 1
)
terminate called after throwing an instance of 'NSException'
发生这种情况的方法是在 FirstViewController 中的一个方法中，该方法作为按钮内触摸事件的结果被调用:
-(void)showProfileView {
NSLog( @"%@", @"Displaying profile view" ); // ***
UAProfileView *profileView = [[UAProfileView alloc] init];
[self presentViewController:profileView animated:TRUE completion:0];
}
此 UAProfielView 是 UIViewController 的子类，是与适当的 .xib 文件一起创建的。
所以问题是，如何在我的 iPhone 应用程序中显示这个新 View ？不能使用 Storyboard，因为我必须支持 iOS 4.0。
最佳答案
presentViewController:animated:completion: 的文档指出它仅在 iOS 5.0 及更高版本上受支持。您提到了对 iOS 4.0 的支持。
试试 presentModalViewController:animated: 代替。或者，使用 nagivationController 并执行 pushViewController:animated:
关于ios - 在 IOS 中显示一个新 View ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9691706/