0

我试图在我的 XML 解析类中有一个带有“YES”和“NO”两个选项的 UIAlertView。单击其中一个选项后，我只会收到 EXC_BAD_ACCESS 错误。这是我的代码：

.m 文件：

  -(void)doneParsing 
  {
            UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"My Alert"
                                                              message:@"Do you want to continue?"
                                                             delegate:self
                                                    cancelButtonTitle:nil
                                                    otherButtonTitles:@"No", @"Yes", nil];
            [myAlert show];
    }

 -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
 {
        if (buttonIndex == 0)
        {
            NSLog(@"user pressed Button Indexed 0");
            // Any action can be performed here
        }
        else
        {
            NSLog(@"user pressed Button Indexed 1");
            // Any action can be performed here
        }
  }

.h 文件

@interface ArsivNoCheck : UIViewController <UIAlertViewDelegate>

堆栈跟踪：

Stack trace : (
    0   TPAO Arastirma                      0x0006de86 -[ArsivNoCheck doneParsing] + 486
    1   libobjc.A.dylib                     0x014ae6b0 -[NSObject performSelector:withObject:] + 70
    2   Foundation                          0x00eda765 __NSThreadPerformPerform + 327
    3   CoreFoundation                      0x01f3bf3f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
    4   CoreFoundation                      0x01f3b96f __CFRunLoopDoSources0 + 239
    5   CoreFoundation                      0x01f5e734 __CFRunLoopRun + 964
    6   CoreFoundation                      0x01f5df44 CFRunLoopRunSpecific + 276
    7   CoreFoundation                      0x01f5de1b CFRunLoopRunInMode + 123
    8   GraphicsServices                    0x021f07e3 GSEventRunModal + 88
    9   GraphicsServices                    0x021f0668 GSEventRun + 104
    10  UIKit                               0x003deffc UIApplicationMain + 1211
    11  TPAO Arastirma                      0x0000244d main + 141
    12  TPAO Arastirma                      0x00002375 start + 53
)

BT结果

* thread #1: tid = 0x1f03, 0x014ac09b libobjc.A.dylib`objc_msgSend + 15, stop reason = EXC_BAD_ACCESS (code=1, address=0xe13e9e76)
    frame #0: 0x014ac09b libobjc.A.dylib`objc_msgSend + 15
    frame #1: 0x007d20bc UIKit`-[UIAlertView(Private) _buttonClicked:] + 294
    frame #2: 0x014ae705 libobjc.A.dylib`-[NSObject performSelector:withObject:withObject:] + 77
    frame #3: 0x003e22c0 UIKit`-[UIApplication sendAction:to:from:forEvent:] + 96
    frame #4: 0x003e2258 UIKit`-[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
    frame #5: 0x004a3021 UIKit`-[UIControl sendAction:to:forEvent:] + 66
    frame #6: 0x004a357f UIKit`-[UIControl(Internal) _sendActionsForEvents:withEvent:] + 578
    frame #7: 0x004a26e8 UIKit`-[UIControl touchesEnded:withEvent:] + 546
    frame #8: 0x00411cef UIKit`-[UIWindow _sendTouchesForEvent:] + 846
    frame #9: 0x00411f02 UIKit`-[UIWindow sendEvent:] + 273
    frame #10: 0x003efd4a UIKit`-[UIApplication sendEvent:] + 436
    frame #11: 0x003e1698 UIKit`_UIApplicationHandleEvent + 9874
    frame #12: 0x021f1df9 GraphicsServices`_PurpleEventCallback + 339
    frame #13: 0x021f1ad0 GraphicsServices`PurpleEventCallback + 46
    frame #14: 0x01f2dbf5 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
    frame #15: 0x01f2d962 CoreFoundation`__CFRunLoopDoSource1 + 146
    frame #16: 0x01f5ebb6 CoreFoundation`__CFRunLoopRun + 2118
    frame #17: 0x01f5df44 CoreFoundation`CFRunLoopRunSpecific + 276
    frame #18: 0x01f5de1b CoreFoundation`CFRunLoopRunInMode + 123
    frame #19: 0x021f07e3 GraphicsServices`GSEventRunModal + 88
    frame #20: 0x021f0668 GraphicsServices`GSEventRun + 104
    frame #21: 0x003deffc UIKit`UIApplicationMain + 1211
    frame #22: 0x0000204d TPAO Arastirma`main(argc=1, argv=0xbffff394) + 141 at main.m:16
    frame #23: 0x00001f75 TPAO Arastirma`start + 53
4

3 回答 3

1

你在用ARC吗？这段代码工作正常，问题一定出在其他地方。但是如果你有没有设置为取消按钮的按钮

UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"My Alert"
                                                  message:@"Do you want to continue?"
                                                 delegate:self
                                        cancelButtonTitle:@"No"
                                        otherButtonTitles:@"Yes", nil];
于 2013-09-13T13:38:15.867 回答
0

使用以下代码行 -

       UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error!" message:@"Your Message" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
      [alert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];
于 2013-10-03T09:22:13.693 回答
0

试试这个：

[myAlert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES]; instead

的 [myAlert show];

于 2013-09-13T13:38:39.087 回答