如何以编程方式添加图像以查看? [英] How to add image to view programmatically?

问题描述

假设你有一个 UIImage *image 和一个 UIView *v

Say you have a UIImage *image and a UIView *v

您将如何以编程方式在视图顶部显示图像?

How would you display the image on top of the view programmatically?

推荐答案

如果你只是想把 UIImage 添加到 UIView 那么你需要在 UIView 和 UIImage 之间添加一个 UIImageView，例如:

If you just want to add the UIImage to the UIView then you need an UIImageView inbetween the UIView and UIImage, such as:

UIImage *image = [[UIImage alloc] init];
UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
UIImageView *iv = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
[iv setImage:image];
[v addSubview:iv];

请注意，以上只是虚拟代码，我已经使用零帧创建了所有 UI 元素.

Note that the above is just dummy code and I've created all UI elements with a zero frame.

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