iOS开发--两张图片合成

在iOS开发过程中  有时候需要对几张图片进行合成

两张图片合成

UIImage * image1 = [UIImage imageNamed:@"1.png"];

UIImage * image2 = [UIImage imageNamed:@"2.png"];

CGSize size = self.myImageView.frame.size;

UIGraphicsBeginImageContext(size);

[image1 drawInRect:CGRectMake(0, 0, size.width, size.height)];

[image2 drawInRect:CGRectMake(30, 30, size.width - 60, size.height - 60)];

UIImage *resultingImage =UIGraphicsGetImageFromCurrentImageContext();

self.myImageView.image = resultingImage;

UIGraphicsEndImageContext();