NSArrayM insertObject中出现异常:阿替尼

Question

我在项目中使用了4个图像。。运行时会导致：

*由于未捕获的异常"NSInvalidArgumentException"而终止应用程序，原因："*-[__NSArrayM insertObject:atIndex:]：对象不能为nil"***首次抛出调用堆栈：

我的代码：

NSArray *imageNames= @[@"jake_2.png",@"jake_3.png",@"jake_4.png",@"jake_5.png "];
// Do any additional setup after loading the view, typically from a nib.
NSMutableArray *images = [[NSMutableArray alloc] init];
for (int i = 0; i < imageNames.count; i++)
{
    [images addObject:[UIImage imageNamed:[imageNames objectAtIndex:i]]];
    UIImageView *slowAnimationImageView = [[UIImageView alloc] initWithFrame:CGRectMake(160, 95, 86, 193)];
    slowAnimationImageView.animationImages = images;
    slowAnimationImageView.animationDuration = 5;
    [self.view addSubview:slowAnimationImageView];
    [slowAnimationImageView startAnimating];
}

Answer 1

您正面临问题，因为您在数组中提供的imageName在资源中不可用。检查数组中的最后一个对象：@"jake_5.png">。它有多余的空间。请将其删除。这就是导致此问题的原因。

更新：

对于动画，需要在将所有图像添加到imageArray中之后进行设置。请参阅此代码以获得帮助并进行更改：

NSMutableArray *images = [[NSMutableArray alloc] init];
for (int i = 0; i < imageNames.count; i++)
{
    [images addObject:[UIImage imageNamed:[imageNames objectAtIndex:i]]];
}
slowAnimationImageView.animationImages = images;
slowAnimationImageView.animationDuration = 5;
[slowAnimationImageView startAnimating]; 

希望它能帮助。。。

Answer 2

带有最后一个图像名称的空格几乎没有错误

 NSArray *imageNames= @[@"jake_2.png",@"jake_3.png",@"jake_4.png",@"jake_5.png"];
    // Do any additional setup after loading the view, typically from a nib.
    NSMutableArray *images = [[NSMutableArray alloc] init];
    for image in imagesNames
    {
        [images addObject:[image];
        UIImageView *slowAnimationImageView = [[UIImageView alloc] initWithFrame:CGRectMake(160, 95, 86, 193)];
        slowAnimationImageView.animationImages = images;
        slowAnimationImageView.animationDuration = 5;
        [self.view addSubview:slowAnimationImageView];
        [slowAnimationImageView startAnimating];
    }

但是，如果您不想像这样添加for循环，请使用方法addObjectOfArray将对象附加到可变数组

Answer 3

NSArray *imageNames= @[@"jake_2.png",@"jake_3.png",@"jake_4.png",@"jake_5.png "]; replace it with 
NSArray *imageNames= @[@"jake_2.png",@"jake_3.png",@"jake_4.png",@"jake_5.png"];

因为你放了一个空格@"jake_5.png"，这张图片可能在资源中不可用，所以它会给你错误。

Answer 4

问题的出现是因为@"jake_5.png ":中有一个额外的空间

NSArray *imageNames= @[@"jake_2.png",@"jake_3.png",@"jake_4.png",@"jake_5.png "];

应该是：

@"jake_5.png"

附录：

您希望UIImageView为一系列图像设置动画的方式不正确：

请用以下内容替换您的：

UIImageView *slowAnimationImageView = [[UIImageView alloc] initWithFrame:CGRectMake(160, 95, 86, 193)];
[self.view addSubview:slowAnimationImageView];
NSArray *imageNames = @[@"jake_2.png", @"jake_3.png", @"jake_4.png", @"jake_5.png"];
NSMutableArray *images = [[NSMutableArray alloc] init];
for (int i = 0; i < imageNames.count; i++)
{
    [images addObject:[UIImage imageNamed:[imageNames objectAtIndex:i]]];
}
slowAnimationImageView.animationImages = images;
slowAnimationImageView.animationDuration = 5;
[slowAnimationImageView startAnimating];