警告消息試圖創建帶有不在框架中的塊的USE_BLOCK_IN_FRAME變量

Question

當設置exception breakpoint並調試獲取警告消息Catchpoint 2（拋出異常）。當前語言：auto;目前爲objective-c 警告：嘗試創建USE_BLOCK_IN_FRAME帶有不在框架中的塊的變量。 （GDB）

這是什麼意思。

在我上UIToolbar的mainviewcontroller情況下都plapause切換按鈕，當點擊使用進行選擇

-(void)playpauseAction:(id)sender 
{ 

if 

    ([audioPlayer isPlaying]){ 

[sender setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateSelected]; 

[audioPlayer pause]; 

    } else { 

[sender setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateNormal]; 

[audioPlayer play]; 

[self performSelector:@selector(displayviewsAction:) withObject:nil afterDelay:11.0]; 

    } 

} 

- (void)displayviewsAction:(id)sender 
{ 
FirstViewController *viewController = [[FirstViewController alloc] init]; 

viewController.view.frame = CGRectMake(0, 0, 320, 480); 

[self.view addSubview:viewController.view]; 

[self.view addSubview:toolbar]; 

[self performSelector:@selector(secondViewController) withObject:nil afterDelay:23]; 

[viewController release]; 

} 

-(void)secondViewController { 
SecondViewController *secondController = [[SecondViewController alloc] init]; 

secondController.view.frame = CGRectMake(0, 0, 320, 480); 

[self.view addSubview:secondController.view]; 

[self.view addSubview:toolbar]; 

[self performSelector:@selector(ThirdviewController) withObject:nil afterDelay:27]; 

[secondController release]; 
} 

當簡單地嘗試運行的應用程序播放的音頻文件，並裝載20視圖控制器一前一後模擬器工作正常，但是當用異常斷點進行調試並點擊播放按鈕開始調試時，會獲得此警告消息。

任何人有想法正在發生的事情有異常斷點。

Answer 1

這是來自調試器的警告，它無法爲特定對象創建任何信息結構。

下面是一個例子：

NSString* string = [[NSString alloc] initWithUTF8String:line]; 

在這行代碼的方法initWithUTF8String

：期望一個UTF-8編碼的C字符串，而不是一個對象的NSString。 所以這次編譯會給USE_BLOCK_IN_FRAME的warrning。

我們要保證所有warrnings有決心，因爲它可以是大的錯誤或應用程序可能會在不久的將來崩潰。

---

更新：

---

-(void)playpauseAction:(id)sender 
{ 

    UIButton *btn = (UIButton *)sender; 
     if([audioPlayer isPlaying]){ 

    [audioPlayer pause]; 

    [btn setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateNormal]; 

     } else { 

    [audioPlayer play]; 
    [btn setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal]; 



[self performSelector:@selector(displayviewsAction) withObject:nil afterDelay:11.0]; 

    } 

} 

- (void)displayviewsAction 
{ 
FirstViewController *viewController = [[FirstViewController alloc] initWithNibName:"FirstViewController"]; 

viewController.view.frame = CGRectMake(0, 0, 320, 480); 

[self.view addSubview:viewController.view]; 

[self.view addSubview:toolbar]; 

[self performSelector:@selector(secondViewController) withObject:nil afterDelay:23]; 

[viewController release]; 

} 

-(void)secondViewController { 
SecondViewController *secondController = [[SecondViewController alloc] init]; 

secondController.view.frame = CGRectMake(0, 0, 320, 480); 

[self.view addSubview:secondController.view]; 

[self.view addSubview:toolbar]; 

[self performSelector:@selector(ThirdviewController) withObject:nil afterDelay:27]; 

[secondController release]; 
}