为所有UIImageViews添加圆角 [英] Add rounded corners to all UIImageViews

问题描述

我想为项目中的所有UIImageView添加一些圆角。我已经有了代码工作，但我必须将它应用于每个图像;我应该继承UIImageView来添加它吗？如果有的话，有人可以给我一些关于如何做的指示吗？

I would like to add some rounded corners to all of the UIImageViews in my project. I have already got the code working, but am having to apply it to every image; should I subclass UIImageView to add this? If so, can someone give me some pointers as to how to do this?

这是代码

- (void)viewDidLoad {
    [super viewDidLoad];
    NSString *mainpath = [[NSBundle mainBundle] bundlePath];
    welcomeImageView.image = [UIImage imageWithContentsOfFile:[mainpath stringByAppendingString:@"/test.png"]];
    welcomeImageView.layer.cornerRadius = 9.0;
    welcomeImageView.layer.masksToBounds = YES;
    welcomeImageView.layer.borderColor = [UIColor blackColor].CGColor;
    welcomeImageView.layer.borderWidth = 3.0;
    CGRect frame = welcomeImageView.frame;
    frame.size.width = 100;
    frame.size.height = 100;
    welcomeImageView.frame = frame;
}

推荐答案

您可以使用类别UIImage是一种子类化的替代方法，有时候只是很小的更改。

You could use a category for UIImage which is an alternate way to subclass a Class and sometimes easier for just small changes.

例如，添加一个返回带有圆角属性的UIImage的方法。

e.g add a method that returns a UIImage with the rounded corner attributes set.

+(UIImage *)imageWithContentsOfFile:(NSString *)file cornerRadius:(NSInteger)... 

有关Objective-c类别的更多信息，请参阅 http://macdevelopertips.com/objective-c/objective-c-categories.html

more info on Objective-c categories can be found http://macdevelopertips.com/objective-c/objective-c-categories.html

这篇关于为所有UIImageViews添加圆角的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！