CGImageRef ir = CGImageCreateWithImageInRect(image.CGImage, CGRectMake(0,0,100,100)); UIImage *subImage = [UIImage imageWithCGImage:ir]; self.image = subImage; CGImageRelease(ir);//释放图片所占的内存
CGImageRef ir = CGImageCreateWithImageInRect(image.CGImage, CGRectMake(0,0,100,100)); UIImage *subImage = [UIImage imageWithCGImage:ir]; self.image = subImage; CGImageRelease(ir);//释放图片所占的内存