前言：本文主要利用AFN來進行圖片上傳，支援單張、多張；

個人覺得導致上傳失敗的原因，大部分情況下都是由於

[formData appendPartWithFileData:imageData name:[NSString stringWithFormat:@"upload%d",i+1] fileName:fileName mimeType:@"image/jpeg"];

其中需要跟後臺約定的有：

1、name:後臺可以通過檔名來獲取到相應的圖片流；

2、mimeType:更多的是讓後臺知道你上傳的型別；

說白了就是報文頭能夠讓後臺識別

NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
    [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"; filename=\"%@\"", name, fileName] forKey:@"Content-Disposition"];
    [mutableHeaders setValue:mimeType forKey:@"Content-Type"];
 

具體程式碼如下

#import <Foundation/Foundation.h>

typedef void(^HttpUploadSuccessBlock)(id Json);
typedef void(^HttpUploadFailureBlock)();

@interface HttpTool : NSObject

/**
 *  上傳圖片(單張)
 *
 *  @param path    路徑
 *  @param image   圖片
 *  @param params  引數
 *  @param success 成功回撥
 *  @param failure 失敗回撥
 */
+ (void)uploadImageWithPath:(NSString *)path image:(UIImage *)image params:(NSDictionary *)params success:(HttpUploadSuccessBlock)success failure:(HttpUploadFailureBlock)failure;

/**
 *  上傳圖片(多張)
 *
 *  @param path    路徑
 *  @param photos  圖片陣列
 *  @param params  引數
 *  @param success 成功回撥
 *  @param failure 失敗回撥
 */
+ (void)uploadImageWithPath:(NSString *)path photos:(NSArray *)photos params:(NSDictionary *)params success:(HttpUploadSuccessBlock)success failure:(HttpUploadFailureBlock)failure;

@end
 

#import "HttpTool.h"
#import "AFNetworking.h"
#import "SVProgressHUD.h"

static AFHTTPSessionManager *manager;

@implementation HttpTool

//為了防止記憶體洩露
+ (AFHTTPSessionManager *)sharedHttpSession
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        manager = [AFHTTPSessionManager manager];
        manager.requestSerializer.timeoutInterval = 10;
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"text/json", @"text/plain", @"text/html", nil];
    });
    return manager;
}

#pragma mark 上傳單張圖片
+ (void)uploadImageWithPath:(NSString *)path image:(UIImage *)image params:(NSDictionary *)params success:(HttpUploadSuccessBlock)success failure:(HttpUploadFailureBlock)failure
{
    NSArray *array = [NSArray arrayWithObject:image];
    [self uploadImageWithPath:path photos:array params:params success:success failure:failure];
}

#pragma mark 上傳圖片
+ (void)uploadImageWithPath:(NSString *)path photos:(NSArray *)photos params:(NSDictionary *)params success:(HttpUploadSuccessBlock)success failure:(HttpUploadFailureBlock)failure
{
    [SVProgressHUD showProgress:-1 status:@"正在上傳,請稍等."];
    path = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    AFHTTPSessionManager *manager = [HttpTool sharedHttpSession];
    [manager POST:path parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        for (int i = 0; i < photos.count; i ++) {
            NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
            
 
[email protected]"yyyyMMddHHmmss";
            NSString *str=[formatter stringFromDate:[NSDate date]];
            NSString *fileName=[NSString stringWithFormat:@"%@.jpg",str];
            UIImage *image = photos[i];
            NSData *imageData = UIImageJPEGRepresentation(image, 0.28);
            [formData appendPartWithFileData:imageData name:[NSString stringWithFormat:@"upload%d",i+1] fileName:fileName mimeType:@"image/jpeg"];
        }
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        MyLog(@"uploadProgress is %lld,總位元組 is %lld",uploadProgress.completedUnitCount,uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSString *resultCode = [NSString stringWithFormat:@"%@",[responseObject objectForKey:@"result_code"]];
        NSString *resultInfo = [responseObject objectForKey:@"result_info"];
        MyLog(@"resultInfo is %@",resultInfo);
        if ([resultCode isEqualToString:@"1"]) {
            [SVProgressHUD showSuccessWithStatus:@"上傳成功"];
            if (success == nil) return ;
            success(responseObject);
        }else {
            [SVProgressHUD showErrorWithStatus:resultInfo];
            if (failure == nil) return ;
            failure();
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        [SVProgressHUD showErrorWithStatus:@"上傳失敗"];
        if (failure == nil) return ;
        failure();
    }];
}