iOS 一次上傳多張圖片, 並返回進度值

我封裝的使用AFNetworking上傳多圖的一個方法。帶進度條回調，希望對你用幫助，我app中親測可用，不知道你的服務器是如何接收數據的：

/**
*  上傳帶圖片的內容，允許多張圖片上傳（URL）POST
*
*  @param url                 網絡請求地址
*  @param images              要上傳的圖片數組（注意數組內容需是圖片）
*  @param parameter           圖片數組對應的參數  (注意多張圖片,每張的圖片名應該不同)
*  @param parameters          其他參數字典
*  @param ratio               圖片的壓縮比例（0.0~1.0之間）
*  @param succeedBlock        成功的回調
*  @param failedBlock         失敗的回調
*  @param uploadProgressBlock 上傳進度的回調
*/
+(void)startMultiPartUploadTaskWithURL:(NSString *)url
                           imagesArray:(NSArray *)images
                     parameterOfimages:(NSString *)parameter
                        parametersDict:(NSDictionary *)parameters
                      compressionRatio:(float)ratio
                          succeedBlock:(void(^)(id operation, id responseObject))succeedBlock
                           failedBlock:(void(^)(id operation, NSError *error))failedBlock
                   uploadProgressBlock:(void(^)(float uploadPercent,long long totalBytesWritten,long long totalBytesExpectedToWrite))uploadProgressBlock;

實現：
+(void)startMultiPartUploadTaskWithURL:(NSString *)url
                           imagesArray:(NSArray *)images
                     parameterOfimages:(NSString *)parameter
                        parametersDict:(NSDictionary *)parameters
                      compressionRatio:(float)ratio
                          succeedBlock:(void (^)(id, id))succeedBlock
                           failedBlock:(void (^)(id, NSError *))failedBlock
                   uploadProgressBlock:(void (^)(float, long long, long long))uploadProgressBlock{
    
    if (images.count == 0) {
        NSLog(@"上傳內容沒有包含圖片");
        return;
    }
    for (int i = 0; i < images.count; i++) {
        if (![images isKindOfClass:[UIImage class]]) {
            NSLog(@"images中第%d個元素不是UIImage對象",i+1);
            return;
        }
    }
    
    AFHTTPRequestOperation *operation = [[self sharedOperation].operationManager POST:url parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        
        int i = 0;
        //根據當前系統時間生成圖片名稱
        NSDate *date = [NSDate date];
        NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
        [formatter setDateFormat:@"yyyy年MM月dd日"];
        NSString *dateString = [formatter stringFromDate:date];
        
        for (UIImage *image in images) {
            NSString *fileName = [NSString stringWithFormat:@"%@%d.png",dateString,i];
            NSData *imageData;
            if (ratio > 0.0f && ratio < 1.0f) {
                 imageData = UIImageJPEGRepresentation(image, ratio);
            }else{
                imageData = UIImageJPEGRepresentation(image, 1.0f);
            }
           
            [formData appendPartWithFileData:imageData name:parameter fileName:fileName mimeType:@"image/jpg/png/jpeg"];
        }
    
        
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        succeedBlock(operation,responseObject);
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@",error);
        failedBlock(operation,error);
        
    }];
    
    [operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
        CGFloat percent = totalBytesWritten * 1.0 / totalBytesExpectedToWrite;
        uploadProgressBlock(percent,totalBytesWritten,totalBytesExpectedToWrite);
    }];
    
}