1、通过image mask来操作,需要添加mask目标图片。
//通过image mask来操作,需要添加mask目标图片。
UIImageView *icon = [[UIImageView alloc] initWithFrame:CGRectMake(0, 300, 100, 100)];
UIGraphicsBeginImageContext(icon.bounds.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextFillRect(ctx, CGRectMake(0, 0, icon.bounds.size.width, icon.bounds.size.height));
UIGraphicsEndImageContext();
UIImage *image = [UIImage imageNamed:@"main.jpg"];
UIImage *roundCorner = [UIImage imageNamed:@"corner_no_clear.png"];
icon.image = image;
CALayer* roundCornerLayer = [CALayer layer];
roundCornerLayer.frame = icon.bounds;
roundCornerLayer.contents = (id)[roundCorner CGImage];
[[icon layer] setMask:roundCornerLayer];
[self.view addSubview:icon];
2、通过imageview的layer来操作
//通过imageview的layer来操作
UIImage *main = [UIImage imageNamed:@"main.jpg"];
UIImage *corner_no_shadow = [UIImage imageNamed:@"corner_no_shadow.png"];
UIImageView *img0 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 10, 100, 100)];
img0.backgroundColor = [UIColor redColor];
img0.image = main;
img0.layer.masksToBounds = YES;
img0.layer.cornerRadius = 50;
[self.view addSubview:img0];
3、能过代码对画布裁剪成圆形–》然后再将原始图像画出来–》
//能过代码对画布裁剪成圆形–》然后再将原始图像画出来–》
UIImage *main = [UIImage imageNamed:@"main.jpg"];
UIImage *corner_no_shadow = [UIImage imageNamed:@"corner_no_shadow.png"];
UIImage *ii = [main circleImage:main withParam:0];
UIImageView *img1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 150, 100, 100)];
img1.image = ii;
[self.view addSubview:img1];