1,工具类定义

- (void)uploadImages:(NSArray<UIImage *> *)images success:(void(^)(NSArray *urls))success failure:(void(^)())failure;

方法尽量简化参数个数，回调尽量方便调用者使用。只需要将需要上传的图片以数组的形式传过来，并用block的方式回调，类似于AFNetworking的网络请求。上传成功后，将图片的url以数据的形式在block中回调给调用者。

工具类内部成员变量：

@interface JKRQiNiuManager ()

@property (nonatomic, strong) QNUploadManager *qnUploadManager;

@end

单子方法：

+ (instancetype)sharedManager {
    static JKRQiNiuManager *instance;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[JKRQiNiuManager alloc] init];
    });
    return instance;
}

调用方法：

    [[JKRQiNiuManager sharedManager] uploadImages:imageArray success:^(NSArray *urls) {
        NSLog(@"上传成功");
    } failure:^{
        NSLog(@"上传失败");
    }];

2,内部处理

- (void)uploadImagess:(NSArray<UIImage *> *)images success:(void (^)(NSArray *urls))success failure:(void (^)())failure {
    if (images == nil || images.count == 0) failure();
    NSMutableArray *urls = [NSMutableArray array]; // 最终返回的图片url数组
    __block NSString *qiNiuToken = @""; // token
    dispatch_async(dispatch_get_global_queue(0, 0), ^{ // 异步处理上传方法
        dispatch_semaphore_t sem = dispatch_semaphore_create(0); // 利用信号量实现顺序上传
        for (UIImage *image in images) { // 遍历图片依次上传
            __block BOOL con; // 记录图片上传是否使用
            NSString *fileName = @""; // fileName
            NSString *domain = @"";   // domain
            [self qiNiuUploadImage:image token:qiNiuToken filename:fileName domain:domain  success:^(NSString *url) {
                con = YES; // 上传成功
                [urls addObject:url]; // 将url添加到结果数组
                dispatch_semaphore_signal(sem);
            } failure:^{
                con = NO; // 上传失败
                dispatch_semaphore_signal(sem);
            }];
            dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
            if (!con) {
                NSLog(@"上传失败");
                failure(); // 上传失败回调
                return;
            }
        }
        success(urls); // 所有图片上传成功后回调
    });
}

上传图片方法：

- (void)qiNiuUploadImage:(UIImage *)image token:(NSString *)token filename:(NSString *)filename domain:(NSString *)domain success:(void (^)(NSString *url))success failure:(void (^)())failure {
    QNUploadOption *uploadOption = [[QNUploadOption alloc] initWithMime:nil progressHandler:^(NSString *key, float percent) {
        NSLog(@"percent == %.2f", percent);
    } params:nil checkCrc:NO cancellationSignal:nil];
    [image jkr_compressToDataLength:300 * 1024 withBlock:^(NSData *data) { // 将图片压缩到300K以下
        [self.qnUploadManager putData:data key:filename token:token complete:^(QNResponseInfo *info, NSString *key, NSDictionary *resp) {
            if (info.ok) { // 上传成功
                NSString *iconUrl = @""; // 处理url拼接逻辑
                success(iconUrl);
            } else {   // 上传失败
                failure();
            }
        } option:uploadOption];
    }];
}