xcode 设置 UIImage 边框
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Setting a UIImage border
提问by Rupert
Is there a way to set borders to a UIImage. I know how to set it for UIImageView, but my problem is the UIImage that I load up in a UIImageview wont be of the same size or aspect ratio as the UIImageView. Hence Ive kept the UIImageView mode to aspect fit. Giving a border to UIImageView now would border the entire UIImageView rather than just the UIImage, and that doesn't look good when the UIImage is not of the same size or aspect ratio as the UIV.
有没有办法为 UIImage 设置边框。我知道如何为 UIImageView 设置它，但我的问题是我在 UIImageview 中加载的 UIImage 不会与 UIImageView 具有相同的大小或纵横比。因此我保持了 UIImageView 模式以适应方面。现在为 UIImageView 设置边框将边框整个 UIImageView 而不仅仅是 UIImage，当 UIImage 与 UIV 的大小或纵横比不同时，这看起来不太好。
Help?
帮助？
回答by Matt Williamson
There's some solutions in this question: How can i take an UIImage and give it a black border?
这个问题有一些解决方案：我怎样才能取一个 UIImage 并给它一个黑色边框？
回答by Sameera R.
#import <QuartzCore/CALayer.h>
UIImageView *imageView = [UIImageView alloc]init];
imageView.layer.masksToBounds = YES;
imageView.layer.borderColor = [UIColor blackColor].CGColor;
imageView.layer.borderWidth = 1;
imageView.layer.cornerRadius = 10; //optional
回答by user2155906
image with border
+(UIImage*)imageWithBorderFromImage:(UIImage*)source
{
CGSize size = [source size];
UIGraphicsBeginImageContext(size);
CGRect rect = CGRectMake(0, 0, size.width, size.height);
[source drawInRect:rect blendMode:kCGBlendModeNormal alpha:1.0];
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetRGBStrokeColor(context,(255/255.f),(255/255.f),(255/255.f), 1.0);
CGContextStrokeRect(context, rect);
UIImage *testImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return testImg;
}
