阿里云圖片上傳的基本思路：

1、選擇圖片

2、將圖片保存在本地，同時返回圖片路徑、并生成縮略圖用于 UI 顯示。

3、上傳圖片，成功后將步驟 2 中的圖片名傳給服務器。

單張圖片上傳的例子官方的 demo 中已經有了，這里直接上多圖上傳。

具體實現是結合 NSOperationQueue，設置 operation 間的依賴來實現多圖上傳。

這里省略步驟 1、2 ，直接上傳圖片：

+ (void)uploadImages:(NSArray<UIImage *> *)images isAsync:(BOOL)isAsync complete:(void(^)(NSArray<NSString *> *names, UploadImageState state))complete
{
    id<OSSCredentialProvider> credential = [[OSSPlainTextAKSKPairCredentialProvider alloc] initWithPlainTextAccessKey:AccessKey                                                                                                            secretKey:SecretKey];
    
    OSSClient *client = [[OSSClient alloc] initWithEndpoint:AliYunHost credentialProvider:credential];
    
    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    queue.maxConcurrentOperationCount = images.count;
    
    NSMutableArray *callBackNames = [NSMutableArray array];
    int i = 0;
    for (UIImage *image in images) {
        if (image) {
            NSBlockOperation *operation = [NSBlockOperation blockOperationWithBlock:^{
                //任務執行
                OSSPutObjectRequest * put = [OSSPutObjectRequest new];
                put.bucketName = BucketName;
                NSString *imageName = [kTempFolder stringByAppendingPathComponent:[[NSUUID UUID].UUIDString stringByAppendingString:@".jpg"]];
                put.objectKey = imageName;
                [callBackNames addObject:imageName];
                NSData *data = UIImageJPEGRepresentation(image, 0.3);
                put.uploadingData = data;
                
                OSSTask * putTask = [client putObject:put];
                [putTask waitUntilFinished]; // 阻塞直到上傳完成
                if (!putTask.error) {
                    NSLog(@"upload object success!");
                } else {
                    NSLog(@"upload object failed, error: %@" , putTask.error);
                }
                if (isAsync) {
                    if (image == images.lastObject) {
                        NSLog(@"upload object finished!");
                        if (complete) {
                            complete([NSArray arrayWithArray:callBackNames] ,UploadImageSuccess);
                        }
                    }
                }
            }];
            if (queue.operations.count != 0) {
                [operation addDependency:queue.operations.lastObject];
            }
            [queue addOperation:operation];
        }
        i++;
    }
    if (!isAsync) {
        [queue waitUntilAllOperationsAreFinished];
        NSLog(@"haha");
        if (complete) {
            if (complete) {
                complete([NSArray arrayWithArray:callBackNames], UploadImageSuccess);
            }
        }
    }
}

Screen Shot 2016-05-31 at 10.09.02 PM.png

根據返回的地址可以 bucketName + aliYunHost + 地址 在瀏覽器中直接訪問了。
例如 bucketName = "my-bucket"; aliYunHost = "http://oss-cn-shenzhen.aliyuncs.com/"; 返回圖片地址 = "temp/69058506-679B-432C-AD11-61A34C067235.jpg";

那么可以通過 “my-bucket.oss-cn-shenzhen.aliyuncs.com/temp/69058506-679B-432C-AD11-61A34C067235.jpg” 直接在瀏覽器中進行訪問

demo: https://github.com/Xigtun/OSSImageUploader