ios合并两张图片(叠加两张图片 重合两张图片)

第一张图片

第二张图片

效果图

创建一个  UIImageView  （黑斜体是关键一行代码）

UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 375, 667)];

    imgView.image = [self addImage:@"psb33" withImage:@"littlesun"];


    imgView.contentMode = UIViewContentModeScaleAspectFit;
    [self.view addSubview:imgView];

方法实现：

- (UIImage *)addImage:(NSString *)imageName1 withImage:(NSString *)imageName2 {

    UIImage *image1 = [UIImage imageNamed:imageName1];
    UIImage *image2 = [UIImage imageNamed:imageName2];

    UIGraphicsBeginImageContext(image1.size);

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

    [image2 drawInRect:CGRectMake((image1.size.width - image2.size.width)/2,(image1.size.height - image2.size.height)/2, image2.size.width, image2.size.height)];

    UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return resultingImage;
}