在 for 循环中增加 UIImageView 变量的数字部分？

发布于 2024-09-18 18:13:46 字数 554 浏览 2 评论 0原文

我有三个 UIImageView 变量，分别称为 myPicture1、myPicture2 和 myPicture3。在 for 循环中，我尝试将 myPicture 末尾的数字增加 1，以便我可以为三个变量中的每一个分配一个随机图像。这是下面的代码：

for (i=0; i<3; i++) {

int g = arc4random() % 19;

NSString *imagename = [NSString stringWithFormat:@"image%d.jpg",g];

UIImage *picture = [UIImage imageNamed:imagename];

 UIImageView imageView = [[UIImageView alloc] initWithImage : picture];

 self.myPicture1 = imageView; **This is where I want myPicture to increase to myPicture 2 and then 3 **

}

这可能吗？

谢谢大家，

马丁

原文

I have a three UIImageView variables called myPicture1, myPicture2 and myPicture3. In a for loop I am trying to increase the number at the end of myPicture by 1 so that I can assign a random image to each of the three variables. Here is the code below :

for (i=0; i<3; i++) {

int g = arc4random() % 19;

NSString *imagename = [NSString stringWithFormat:@"image%d.jpg",g];

UIImage *picture = [UIImage imageNamed:imagename];

 UIImageView imageView = [[UIImageView alloc] initWithImage : picture];

 self.myPicture1 = imageView; **This is where I want myPicture to increase to myPicture 2 and then 3 **

}

Is this possible ?

Thanks all,

Martin

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苦笑流年记忆 2024-09-25 18:13:46

好吧，我认为你正在以一种有点尴尬的方式处理这个问题。
也许最好的方法是将您的 UIImageView 存储在 NSArray 中。
所以在你的类声明中，而不是

@property (nonatomic, retain) UIImageView *myPicture1;
@property (nonatomic, retain) UIImageView *myPicture2;
@property (nonatomic, retain) UIImageView *myPicture3;

你会

@property (nonatomic, retain) NSArray *myPictures;

然后你像这样创建它们：

NSMutableArray *myTempArray = [NSMutableArray arrayWithCapacity:3];
for (i=0; i<3; i++)
{
    int g = arc4random() % 19;

    NSString *imagename = [NSString stringWithFormat:@"image%d.jpg",g];
    UIImage *picture = [UIImage imageNamed:imagename];

    UIImageView imageView = [[UIImageView alloc] initWithImage : picture];
    [myTempArray addObject: imageView];
    [imageView release];
}
self.myPictures = [NSArray arrayWithArray: myTempArray];

well, I think you're approaching this in a kinda awkward way.
probably the best way to do that is to have your UIImageViews stored in an NSArray.
So in your class declaration, instead of

@property (nonatomic, retain) UIImageView *myPicture1;
@property (nonatomic, retain) UIImageView *myPicture2;
@property (nonatomic, retain) UIImageView *myPicture3;

you would have

@property (nonatomic, retain) NSArray *myPictures;

And then you create them like this:

NSMutableArray *myTempArray = [NSMutableArray arrayWithCapacity:3];
for (i=0; i<3; i++)
{
    int g = arc4random() % 19;

    NSString *imagename = [NSString stringWithFormat:@"image%d.jpg",g];
    UIImage *picture = [UIImage imageNamed:imagename];

    UIImageView imageView = [[UIImageView alloc] initWithImage : picture];
    [myTempArray addObject: imageView];
    [imageView release];
}
self.myPictures = [NSArray arrayWithArray: myTempArray];

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