iOS:使用标签值更改UIImageView [英] IOS: change UIImageView with tag value

问题描述

我有20个UIImageView，我想更改其图像；但是我不想创建20个IBOutlet，并且我想使用标签值来更改图像；我在接口构建器中设置标签值，然后呢?如果要更改Imageview号为15的图像?我该怎么办?

I have 20 UIImageView and i want change their image; but I don't want to create 20 IBOutlet, and I want to use tag value to change the image; I set the tag value in interface builder and after? If I want to change image at Imageview number 15? How can I do?

推荐答案

如果使用标签，您可以像下面这样标识您的标签视图(UIImageView是UIView的子类，具有标签属性):

If you use tags you can identify your tagged view (UIImageView is a subclass of UIView, which has the tag attribute) like this:

- (UIView *)viewWithTag:(NSInteger)tag

因此，如果您在超级视图(所有UIImageViews都驻留在其上)上调用此方法，则应该这样:

So if you call this method on your superview (which all the UIImageViews reside in), you should do it like this:

UIImageView *myImageView = (UIImageView *)[myAwesomeSuperview viewWithTag:15];

(文档我使用Google找到).

(Documentation I found using Google).

P.S:如果您认为添加20个IBOutlet太繁琐，建议您也以编程方式创建UIImageViews.这样，您将完全不需要xib文件，只需编写一小段代码，并以更少的努力获得更好的维护.

P.S: if you think it is too much work to add 20 IBOutlets, I recommend you create the UIImageViews programmatically as well. This way you will not need a xib file at all, write a small piece of code and have better maintenance with less effort.

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