NSArrayM 异常 insertObject:atindex

Question

我在项目中使用了 4 张图像..而运行结果是：

* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[__NSArrayM insertObject:atIndex:]: object cannot be nil' *** First throw call stack:

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

您遇到问题是因为您在数组中提供的图像名称在资源中不可用。检查数组中的最后一个对象：@"jake_5.png "。里面多了一个space。请删除它。这就是导致此问题的原因。

更新：

对于动画，您需要在将所有图像添加到您的imageArray 后进行设置。请参考此代码以获取帮助并进行更改：

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];

希望对您有所帮助...

Answer 2

最后一张图片的名字Space没有错

 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

出现问题是因为@"jake_5.png "中多了一个space:

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 为一系列图像制作动画的方式不正确：

请将您的替换为以下内容：

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];

Answer 4

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"];

因为你把 space @"jake_5.png " 可能是这个图像在资源中不可用所以它给你错误。

NSArrayM 异常 insertObject:atindex

exception in NSArrayM insertObject:atindex

nsarray

ios