xcode – iOS – 在具有参数的Button上调用选择器

您好希望这是一个容易解决的问题.

我试图做的是在按钮动作上有一个选择器,它使用要播放的电影的fileName调用我的其他方法.如果我将文件名移回方法,它可以完美地工作.

我相信我磕磕绊绊的是将选择器添加到Button的正确方法.任何意见/建议或建议将不胜感激.

提前致谢.

//The Button
    infobuttonTwo           = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    infobuttonTwo.frame     = CGRectMake(405,204,49,58);
    [infobuttonTwo addTarget:self 
                      action:@selector(buttonInfo:) withObject:@"VTS_02_1" 
            forControlEvents:UIControlEventTouchUpInside];



//The Method It's calling
-(void)buttonInfo:(NSString *) fileName {



//The Error it's showing.
-[UIRoundedRectButton addTarget:action:withObject:forControlEvents:]: unrecognized selector sent to instance 0x660e9e0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',reason: '-[UIRoundedRectButton addTarget:action:withObject:forControlEvents:]: unrecognized selector sent to instance 0x660e9e0'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x011bfbe9 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x013145c2 objc_exception_throw + 47
    2   CoreFoundation                      0x011c16fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
    3   CoreFoundation                      0x01131366 ___forwarding___ + 966
    4   CoreFoundation                      0x01130f22 _CF_forwarding_prep_0 + 50
    5   bCIT                                0x000054f3 -[TrailersViewController popButtons] + 647
    6   bCIT                                0x0000444b -[TrailersViewController right] + 437
    7   bCIT                                0x00003b2d -[TrailersViewController handleSwipeFrom:] + 191
    8   UIKit                               0x005559c7 -[UIGestureRecognizer _updateGestureWithEvent:] + 727
    9   UIKit                               0x005519d6 -[UIGestureRecognizer _delayedUpdateGesture] + 47
    10  UIKit                               0x00557fa5 _UIGestureRecognizerUpdateObserver + 584
    11  UIKit                               0x0055818a _UIGestureRecognizerUpdateGesturesFromSendEvent + 51
    12  UIKit                               0x002f36b4 -[UIWindow _sendGesturesForEvent:] + 1292
    13  UIKit                               0x002eef87 -[UIWindow sendEvent:] + 105
    14  UIKit                               0x002d237a -[UIApplication sendEvent:] + 447
    15  UIKit                               0x002d7732 _UIApplicationHandleEvent + 7576
    16  GraphicsServices                    0x01af5a36 PurpleEventCallback + 1550
    17  CoreFoundation                      0x011a1064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
    18  CoreFoundation                      0x011016f7 __CFRunLoopDoSource1 + 215
    19  CoreFoundation                      0x010fe983 __CFRunLoopRun + 979
    20  CoreFoundation                      0x010fe240 CFRunLoopRunSpecific + 208
    21  CoreFoundation                      0x010fe161 CFRunLoopRunInMode + 97
    22  GraphicsServices                    0x01af4268 GSEventRunModal + 217
    23  GraphicsServices                    0x01af432d GSEventRun + 115
    24  UIKit                               0x002db42e UIApplicationMain + 1160
    25  bCIT                                0x000029b4 main + 102
    26  bCIT                                0x00002945 start + 53
)
terminate called after throwing an instance of 'NSException

解决方法

好吧,你的问题是addTarget：action：withObject：forControlEvents：不是UIControl上存在的方法.您需要找到一些其他方法来跟踪您的对象值,无论是在ivar,某些中间数据源还是其他方面.

有一段时间有一个similar question有一些建议.