最近产品给了一个奇葩的需求，需要把一个活动海报和用户生成的二维码合成一张图片，分享出去，效果如下：
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:[self createImageWithString:@“生成二维码规则”] 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;}
// 生成二维码- (UIImage *)createImageWithString:(NSString *)string{// 1.实例化二维码滤镜CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];// 2.恢复滤镜的默认属性（因为滤镜可能保存上一次的属性）[filter setDefaults];// 3.讲字符串转换为NSDataNSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];// 4.通过KVO设置滤镜inputMessage数据[filter setValue:data forKey:@"inputMessage"];// 5.通过了滤镜输出的图像CIImage *outputImage = [filter outputImage];// 6.因为生成的二维码模糊，所以通过createNonInterpolatedUIImageFormCIImage:outputImage来获得高清的二维码图片UIImage *image = [self getErWeiMaImageFormCIImage:outputImage withSize:200];return image;}
如果觉得《iOS 合并两张图片(叠加两张图片 重合两张图片)》对你有帮助，请点赞、收藏，并留下你的观点哦！
