Question

按下UI按钮时出现内存错误。我在自定义类文件中动态创建这些按钮，因此每次调用类时，都会根据视图控制器创建一定数量的按钮。他们创建的代码如下：

- (void)addTopicButtonsWithCount:(int)count andView:(UIScrollView*)referenceView
{
    int i = 0;

    for(NSString *theory in _chapterTheory)
{
    [self makeButtonWithTitle:[NSString stringWithFormat:@"%@", self.chapterTheory[i][@"title"]] atPositionIndex:i andView:referenceView];
    i++;
}
}


- (void)makeButtonWithTitle:(NSString *)title atPositionIndex:(NSInteger)index andView:   (UIScrollView*)referenceView
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(80, 80+(60*index), 160, 40);

    button.tag = index;
    [button setTitle:title forState:UIControlStateNormal];
    button.titleLabel.font = [UIFont systemFontOfSize:16];
    button.titleLabel.textColor = [UIColor blackColor];
    button.backgroundColor = [UIColor blackColor];
    [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    [referenceView addSubview:button];
}

创建按钮后，我尝试使用此功能访问它们：

- (void)buttonPressed:(UIButton *)sender {
    NSLog(@"button %d pressed", sender.tag+1);
}

但是我甚至没有达到这个功能，我在第一行这个buttonPressed方法上设置了一个断点，但是编译器永远不会达到此品脱，它会事先崩溃。按钮好像很好，我错过了什么？

请求崩溃日志：

2014-02-05 21：27：49.242 theoryDisplay [67820：70b] - [UIScrollView buttonPressed：]：无法识别的选择器发送到实例0x8d54180

2014-02-05 21：27：49.245 theoryDisplay [67820：70b] * 由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [ UIScrollView buttonPressed：]：无法识别的选择器发送到实例0x8d54180＆＃39;

* 第一次抛出调用堆栈：（ 0 CoreFoundation 0x0173b5e4 __exceptionPreprocess + 180

1   libobjc.A.dylib                     0x014be8b6 objc_exception_throw + 44
2   CoreFoundation                      0x017d8903 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
3   CoreFoundation                      0x0172b90b ___forwarding___ + 1019
4   CoreFoundation                      0x0172b4ee _CF_forwarding_prep_0 + 14
5   libobjc.A.dylib                     0x014d0874 -[NSObject performSelector:withObject:withObject:] + 77
6   UIKit                               0x0022e0c2 -[UIApplication sendAction:to:from:forEvent:] + 108
7   UIKit                               0x0022e04e -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
8   UIKit                               0x003260c1 -[UIControl sendAction:to:forEvent:] + 66
9   UIKit                               0x00326484 -[UIControl _sendActionsForEvents:withEvent:] + 577
10  UIKit                               0x00325733 -[UIControl touchesEnded:withEvent:] + 641
11  UIKit                               0x005a0c7f _UIGestureRecognizerUpdate + 7166
12  UIKit                               0x0026b19a -[UIWindow _sendGesturesForEvent:] + 1291
13  UIKit                               0x0026c0ba -[UIWindow sendEvent:] + 1030
14  UIKit                               0x0023fe86 -[UIApplication sendEvent:] + 242
15  UIKit                               0x0022a18f _UIApplicationHandleEventQueue + 11421
16  CoreFoundation                      0x016c483f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
17  CoreFoundation                      0x016c41cb __CFRunLoopDoSources0 + 235
18  CoreFoundation                      0x016e129e __CFRunLoopRun + 910
19  CoreFoundation                      0x016e0ac3 CFRunLoopRunSpecific + 467
20  CoreFoundation                      0x016e08db CFRunLoopRunInMode + 123
21  GraphicsServices                    0x036e09e2 GSEventRunModal + 192
22  GraphicsServices                    0x036e0809 GSEventRun + 104
23  UIKit                               0x0022cd3b UIApplicationMain + 1225
24  theoryDisplay                       0x0000371d main + 141
25  libdyld.dylib                       0x01d7970d start + 1

） libc ++ abi.dylib：以NSException类型的未捕获异常终止

EXE BAD ACCESS触摸在类中动态创建的UI按钮时出错

0 个答案: