模拟器崩溃"[NSMutableArray insertObject:atIndex:]:尝试将nil对象插入0'"

Question

我正在开发一个应用程序,它将使用自定义图像选择器并尽可能地尝试,我似乎无法让应用程序运行得非常正确.Xcode调试器标记以下"线程1:程序接收信号:"SIGABRT"."

  - (id) init { 
    if ((self = [super init])) {
        _images =  [[NSMutableArray alloc] init];
        _thumbs =  [[NSMutableArray alloc] init];
    }
    return self;
}

- (void)addImage:(UIImage *)image {
    [_images addObject:image];
    [_thumbs addObject:[image imageByScalingAndCroppingForSize:CGSizeMake(64, 64)]];
}

这是在新调试器的xcode 4中.提前致谢.

Answer 1

其中一个对象是零.以下代码将帮助您发现哪一个:

- (void)addImage:(UIImage *)image 
{
    if (image)
    {
        [_images addObject:image];
    }
    else
    {
        NSLog(@"image is nil");
    }

    UIImage *newImage = [image imageByScalingAndCroppingForSize:CGSizeMake(64, 64)];
    if (newImage)
    {
        [_thumbs addObject:newImage];
    }
    else
    {
        NSLog(@"newImage is nil");
    }
}