亚马逊SDK资源上传功能的实现

因为公司业务的原因，新的APP使用白山云存储上传图片视频资源，而白山云移动端存储功能的实现依赖亚马逊的SDK，下面就简单介绍一下使用亚马逊SDK上传图片
AmazonSDK地址

首先导入AmazonSDK

69636E35-EA72-4738-9CD6-C69B87E6EBC0.png

然后在application:didFinishLaunchingWithOptions方法里设置好SDK的配置

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    ...
    [self configAWS]; 
    ...
    return YES;
}

配置上传需要的参数：

- (void)configAWS {
    AWSEndpoint *EndPoint = [[AWSEndpoint alloc] initWithURLString:END_POINT];
    
    AWSBasicSessionCredentialsProvider *provider =
    [[AWSBasicSessionCredentialsProvider alloc] initWithAccessKey:ACCESS_KEY
                                                        secretKey:SECRET_KEY
                                                     sessionToken:@"latest"];
    //如果有identityPoolId，可以使用identityPoolId设置
    //AWSCognitoCredentialsProvider *provider = [[AWSCognitoCredentialsProvider alloc] initWithRegionType:AWSRegionUSEast1 identityPoolId:POOL_ID];
    
    AWSServiceConfiguration *configuration =
    [[AWSServiceConfiguration alloc] initWithRegion:AWSRegionUSEast1
                                           endpoint:EndPoint
                                credentialsProvider:provider];
    
    AWSServiceManager.defaultServiceManager.defaultServiceConfiguration = configuration;
}

上传实现：

+ (void)updateImageWithImage:(UIImage *)image completion:(void (^)(NSString *))completion {
    
    CGFloat width = image.size.width;
    CGFloat height = image.size.height; 
    
    NSString *fileName = [[[NSProcessInfo processInfo] globallyUniqueString] stringByAppendingString:@".png"];
    
    NSString *filePath = [self saveToFilePathWithImage:image name:fileName];
    
    
    __weak NSString *weakFileName = fileName;
    
    id(^ContinuationBlock)(AWSTask *task) = ^id(AWSTask *task) {
        if (task.error) {
            [SVProgressHUD showErrorWithStatus:@"上传失败"];
            if (completion) {
                completion(nil);
            }
        }
        else {
            __strong NSString *strongFileName = weakFileName;
            //上传成功并不返回url，访问资源需要使用AmazonSDK解码，可以在上传的时候设置成可读写，然后用拼接出来的url访问图片
            NSString *url = [[@"http:/ /....com" stringByAppendingPathComponent:BUCKET_NAME] stringByAppendingPathComponent:strongFileName];
            url = [url stringByReplacingOccurrencesOfString:@" " withString:@""];
            if (completion) {
                completion(url);
            }
        }
        
        return nil;
    };
    
    AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
    uploadRequest.body = [NSURL fileURLWithPath:filePath];
    uploadRequest.key = fileName;
    
    uploadRequest.bucket = @"your bucket name(这里填你的bucketname)";
    // 设置成可读写的，才可以使用拼接的url
    uploadRequest.ACL = AWSS3ObjectCannedACLPublicReadWrite;
    
    
    AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
    
    [[transferManager upload:uploadRequest] continueWithBlock:ContinuationBlock];
}

+ (NSString *)saveToFilePathWithImage:(UIImage *)image
                                 name:(NSString *)name {
    NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"upload"];
    NSFileManager *manager = [NSFileManager defaultManager];
    if (![manager fileExistsAtPath:filePath]) {
        [manager createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil];
    }
    filePath = [filePath stringByAppendingPathComponent:name];
    NSData * imageData = UIImagePNGRepresentation(image);
    [imageData writeToFile:filePath atomically:YES];
    
    return filePath;
}

这样就能实现上传功能了