我对AFNetworking 2.0相对较新。使用下面的代码段,我已经能够成功将照片上传到我的网址。我想跟踪增量上传进度,但我找不到使用2.0版本执行此操作的示例。我的应用程序是iOS 7,因此我选择了AFHTTPSessionManager。
有人可以举例说明如何修改此代码段以跟踪上传进度吗?
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"myimage.jpg"], 1.0);
[manager POST:@"http://myurl.com" parameters:dataToPost constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData name:@"attachment" fileName:@"myimage.jpg" mimeType:@"image/jpeg"];
} success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(@"Success %@", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(@"Failure %@, %@", error, [task.response description]);
}];
答案 0 :(得分:55)
AFHTTPSession
的接口不提供设置进度块的方法。相反,您必须执行以下操作:
// 1. Create `AFHTTPRequestSerializer` which will create your request.
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
// 2. Create an `NSMutableURLRequest`.
NSMutableURLRequest *request =
[serializer multipartFormRequestWithMethod:@"POST" URLString:@"http://www.myurl.com"
parameters:dataToPost
constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData
name:@"attachment"
fileName:@"myimage.jpg"
mimeType:@"image/jpeg"];
}];
// 3. Create and use `AFHTTPRequestOperationManager` to create an `AFHTTPRequestOperation` from the `NSMutableURLRequest` that we just created.
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
AFHTTPRequestOperation *operation =
[manager HTTPRequestOperationWithRequest:request
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"Success %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure %@", error.description);
}];
// 4. Set the progress block of the operation.
[operation setUploadProgressBlock:^(NSUInteger __unused bytesWritten,
long long totalBytesWritten,
long long totalBytesExpectedToWrite) {
NSLog(@"Wrote %lld/%lld", totalBytesWritten, totalBytesExpectedToWrite);
}];
// 5. Begin!
[operation start];
此外,您不必通过UIImage
读取图像,然后使用JPEG再次压缩它以获得NSData
。只需使用+[NSData dataWithContentsOfFile:]
直接从您的包中读取文件。
答案 1 :(得分:14)
AFHTTPSessionManager
的界面确实没有提供跟踪上传进度的方法。 但 AFURLSessionManager
确实如此。
由于AFURLSessionManager
AFHTTPSessionManager
的继承类可以跟踪上传进度,如下所示:
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:kUploadImageURL parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:UIImageJPEGRepresentation(image, 0.5) name:@"uploadFile" fileName:@"image" mimeType:@"image/jpeg"];
} error:nil];
NSProgress *progress;
NSURLSessionDataTask *uploadTask = [[AFHTTPSessionManager sharedManager] uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
if (!error) {
//handle upload success
} else {
//handle upload failure
}
}];
[uploadTask resume];
[progress addObserver:self forKeyPath:@"fractionCompleted" options:NSKeyValueObservingOptionNew context:NULL];
外面
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if ([keyPath isEqualToString:@"fractionCompleted"] && [object isKindOfClass:[NSProgress class]]) {
NSProgress *progress = (NSProgress *)object;
//progress.fractionCompleted tells you the percent in CGFloat
}
}
使用KVO
跟踪进度意味着self
在观察期间需要活着。更优雅的方式是AFURLSessionManager
的方法setTaskDidSendBodyDataBlock
,如下所示:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager setTaskDidSendBodyDataBlock:^(NSURLSession *session, NSURLSessionTask *task, int64_t bytesSent, int64_t totalBytesSent, int64_t totalBytesExpectedToSend) {
//during the progress
}];
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:kUploadImageURL parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:UIImageJPEGRepresentation(image, 0.5) name:@"uploadFile" fileName:@"image" mimeType:@"image/jpeg"];
} error:nil];
NSURLSessionDataTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
if (!error) {
//handle upload success
} else {
//handle upload failure
}
}];
[uploadTask resume];