最近在做图片上传的功能,使用的AFNetworking提供的方法上传图片,发现多张图片时总是只有一张图片上传到后台。
有问题的上传代码为:
特别提醒:
创建AFHTTPsessionManager时,直接使用[AFHTTPSessionManager manager]会造成内存泄漏,需要实现单列方法,可参看AFNetworking的Demo
AFHTTPSessionManager *manager = [TPHTTPTool sharedHTTPManager]; manager.responseSerializer = [AFJSONResponseSerializer serializer]; //设置响应头可以接收的content-type NSMutableSet *tempSet = [manager.responseSerializer.acceptableContentTypes mutableCopy]; [tempSet addObjectsFromArray:@[@"text/html"]]; manager.responseSerializer.acceptableContentTypes = [tempSet copy]; [manager POST:URL_detailPatientUpdate parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) { for(NSInteger i = 0; i < images.count; i++){ //取出单张图片二进制数据 id obj = images[i]; UIImage *image = nil; if ([obj isKindOfClass:[UIImage class]]) { image = (UIImage *)obj; }else{ image = [UIImage imageWithContentsOfFile:obj]; } if (image) { NSData *imageData = [TPDataTool dataWithImage:image maxKB:500.0f]; NSLog(@"图片大小:%ld K" , (long)imageData.length / 1024); // 上传filename NSString *fileName = [NSString stringWithFormat:@"image_%ld.jpg", (long)blockI]; [formData appendPartWithFileData:imageData name:@"file" fileName:fileName mimeType:@"image/jpeg"]; } } } PRogress:^(NSProgress * _Nonnull uploadProgress) { } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responSEObject) { } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { }];找后台调试后发现,通过上面的方法上传多张图片,实际上只有一张被传到后台,可能的原因是:
上传多张图片时,由于url的参数没有变化,iOS默认是同一个请求,只发送了一次请求给后台,故后台只收到一张图片。
解决办法是将循环把整个请求方法都包起来。代码为:
// 上传多张图片 for(NSInteger i = 0; i < images.count; i++) { AFHTTPSessionManager *manager = [TPHTTPTool sharedHTTPManager]; manager.responseSerializer = [AFJSONResponseSerializer serializer]; //设置响应头可以接收的content-type NSMutableSet *tempSet = [manager.responseSerializer.acceptableContentTypes mutableCopy]; [tempSet addObjectsFromArray:@[@"text/html"]]; manager.responseSerializer.acceptableContentTypes = [tempSet copy]; __block NSInteger blockI = i; [manager POST:URL_detailPatientUpdate parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) { //取出单张图片二进制数据 id obj = images[blockI]; UIImage *image = nil; if ([obj isKindOfClass:[UIImage class]]) { image = (UIImage *)obj; }else{ image = [UIImage imageWithContentsOfFile:obj]; } if (image) { NSData *imageData = [TPDataTool dataWithImage:image maxKB:500.0f]; NSLog(@"图片大小:%ld K" , (long)imageData.length / 1024); // 上传filename NSString *fileName = [NSString stringWithFormat:@"image_%ld.jpg", (long)blockI]; [formData appendPartWithFileData:imageData name:@"file" fileName:fileName mimeType:@"image/jpeg"]; } } progress:^(NSProgress * _Nonnull uploadProgress) { } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { }];}
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