如何解决NZombie iOS中

我开发一个应用程序在iOS的如何解决NZombie iOS中

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这个应用程序将捕获的签名，也重绘他们从数据库中回...

的问题出现了，当我添加的线程，用于在签名时在标签上实时打印生物特征数据，随机它会崩溃，我的意思是它有时会使签名完整，有时只是签名的3/4，甚至不是它的一半。 ...

使用了一种名为仪器工具试图检测NSZombies，这是我得到了什么？

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，并在寻找的代码，这是我发现的代码部分.. 。

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这是它崩溃一段代码：

-(void)imprimeValoresFirmaEnTabla:(NSMutableArray *)valores{ 
    if ([valores count] == 3) { 
     if ([valores objectAtIndex:0] != nil) self.pressureStrokeLabel.text = [valores objectAtIndex:0]; 
     if ([valores objectAtIndex:1] != nil) self.speedStrokeLabel.text = [valores objectAtIndex:1]; 
     if ([valores objectAtIndex:2] != nil) self.locationStrokeLabel.text = [valores objectAtIndex:2];   
    } 
}

它说 - [NSConcreteMutableAtributedString lenght]是负责的僵尸

，这是我的代码：

- (IBAction)drawSignature{ 

    [self clear]; // clear the canvas 
    NSData *datos = [self desSerializarFirma:[self traerFirmadeBD]]; //unpack the registered signature and store it on the NSData object 

    if (datos.length <= 1) // if there's no data stored on database 
     [[[UIAlertView alloc]initWithTitle:@"Notification" message:@"For showing your signature, it is required to register it first, draw your signature on the canvas and tap the Save button" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil] show]; 

    if (datos.length > 1) { // if is data stored on database 

     //store the signature on the object 
     self.firmaCompleta = [NSKeyedUnarchiver unarchiveObjectWithData:datos]; 


     //this loop draws each point on the canvas 
     for (int i = 0; i < [self.firmaCompleta.location count]; i++) { 


      SmoothStroke *currentStroke = [canvasView getStrokeForTouchHash:[[self.firmaCompleta.touchHash objectAtIndex:i] intValue]]; 

      //this draws each point using the biometric info 
      [canvasView addLineToAndRenderStroke:currentStroke 
             toPoint:CGPointFromString([self.firmaCompleta.location objectAtIndex:i]) 
             toWidth:[canvasView widthForPressure:[[self.firmaCompleta.pressure objectAtIndex:i] intValue]] 
             toColor:[canvasView colorForPressure:[[self.firmaCompleta.pressure objectAtIndex:i] intValue]]]; 



      //this stores the biometric data in an array for sending to background thread 
      if (!valoresFirma) valoresFirma = [[NSMutableArray alloc]init]; 
      [valoresFirma removeAllObjects]; 

      [valoresFirma addObject:[NSString stringWithFormat: @"%f", [canvasView widthForPressure:[[self.firmaCompleta.pressure objectAtIndex:i] intValue]]]]; 
      [valoresFirma addObject:[NSString stringWithFormat:@"%f",velocidadTrazo]]; 
      [valoresFirma addObject:[self.firmaCompleta.location objectAtIndex:i]]; 


      //this triggers the tread for printing the values on labels (real time)   
      [NSThread detachNewThreadSelector:@selector(imprimeValoresFirmaEnTabla:) toTarget:self withObject:valoresFirma]; 

     } 
    } 
}

和线程调用的代码：

-(void)imprimeValoresFirmaEnTabla:(NSMutableArray *)valores{ 
    if ([valores count] == 3) { 
     if ([valores objectAtIndex:0] != nil) self.pressureStrokeLabel.text = [valores objectAtIndex:0]; 
     if ([valores objectAtIndex:1] != nil) self.speedStrokeLabel.text = [valores objectAtIndex:1]; 
     if ([valores objectAtIndex:2] != nil) self.locationStrokeLabel.text = [valores objectAtIndex:2];   
    } 
}

感谢提前为您的支持

来源

2013-08-06 Jesús Ayala

串在你VALORES阵列已经释放。可能通过另一个线程。 –

如何阻止释放我的valores数组的线程？因为我从其他一些新线程使用它们？ –

不要这样穿线，它太容易拍摄了你自己在脚下。创建一个NSOperation子类来完成绘图。创建一个采用数组的自定义初始化程序。使用操作对象存储数组，以便知道它不会在您发布。与detachNewThreadSelector相比，它有一些额外的代码行，但它更安全。另外，如果用户离开您展示的视图，则可以取消操作。

阅读上这里的操作和操作队列： http://developer.apple.com/library/mac/#documentation/General/Conceptual/ConcurrencyProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008091

来源

2013-08-06 23:14:51 jsd

如何解决NZombie iOS中

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