AFNetworking 2.X
/**
* @author Jakey
*
* @brief 下载文件
*
* @param parameters 附加post参数
* @param requestURL 请求地址
* @param savedPath 保存 在磁盘的位置
* @param success 下载成功回调
* @param failure 下载失败回调
* @param progress 实时下载进度回调
*/
- (void)downloadFileWithOption:(NSDictionary *)parameters
withInferface:(NSString*)requestURL
savedPath:(NSString*)savedPath
downloadSuccess:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
downloadFailure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
progress:(void (^)(float progress))progress
{
//沙盒路径 //NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/xxx.zip"];
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *request =[serializer requestWithMethod:@"POST" URLString:requestURL parameters:parameters error:nil];
//以下是手动创建request方法 AFQueryStringFromParametersWithEncoding有时候会保存
// NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:requestURL]];
// NSMutableURLRequest *request =[[[AFHTTPRequestOperationManager manager]requestSerializer]requestWithMethod:@"POST" URLString:requestURL parameters:paramaterDic error:nil];
//
// NSString *charset = (__bridge NSString *)CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
//
// [request setValue:[NSString stringWithFormat:@"application/x-www-form-urlencoded; charset=%@", charset] forHTTPHeaderField:@"Content-Type"];
// [request setHTTPMethod:@"POST"];
//
// [request setHTTPBody:[AFQueryStringFromParametersWithEncoding(paramaterDic, NSASCIIStringEncoding) dataUsingEncoding:NSUTF8StringEncoding]];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];
[operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:savedPath append:NO]];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
float p = (float)totalBytesRead / totalBytesExpectedToRead;
progress(p);
NSLog(@"download：%f", (float)totalBytesRead / totalBytesExpectedToRead);
}];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
success(operation,responseObject);
NSLog(@"下载成功");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
success(operation,error);
NSLog(@"下载失败");
}];
[operation start];
}
//使用
- (IBAction)downloadTouched:(id)sender {
NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/QQ7.6.exe"];
// NSDictionary *paramaterDic= @{@"jsonString":[@{@"userid":@"2332"} JSONString]?:@""};
[self downloadFileWithOption:@{@"userid":@"123123"}
withInferface:@"http://dldir1.qq.com/qqfile/qq/QQ7.6/15742/QQ7.6.exe"
savedPath:savedPath
downloadSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
} downloadFailure:^(AFHTTPRequestOperation *operation, NSError *error) {
} progress:^(float progress) {
}];
}
AFNetworking 3.X
- (void)downloadFileWithURL:(NSString*)requestURLString
parameters:(NSDictionary *)parameters
savedPath:(NSString*)savedPath
downloadSuccess:(void (^)(NSURLResponse *response, NSURL *filePath))success
downloadFailure:(void (^)(NSError *error))failure
downloadProgress:(void (^)(NSProgress *downloadProgress))progress
{
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *request =[serializer requestWithMethod:@"POST" URLString:requestURLString parameters:parameters error:nil];
NSURLSessionDownloadTask *task = [[AFHTTPSessionManager manager] downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
progress(downloadProgress);
} destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
return [NSURL fileURLWithPath:savedPath];
} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
if(error){
failure(error);
}else{
success(response,filePath);
}
}];
[task resume];
}
调用
- (IBAction)downloadTouched:(id)sender {
NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/QQ7.6.exe"];
[self downloadFileWithURL:@"http://dldir1.qq.com/qqfile/qq/QQ7.6/15742/QQ7.6.exe" parameters:@{@"userid":@"123123"} savedPath:savedPath downloadSuccess:^(NSURLResponse *response, NSURL *filePath) {
} downloadFailure:^(NSError *error) {
} downloadProgress:^(NSProgress *downloadProgress) {
NSLog(@"总大小：%lld,当前大小:%lld",downloadProgress.totalUnitCount,downloadProgress.completedUnitCount);
}];
}
问题
有些人的AFNetworking 3 progress参数是一个指针，并不是一个block，如下：
- (void)addDelegateForDownloadTask:(NSURLSessionDownloadTask *)downloadTask
progress:(NSProgress * __autoreleasing *)progress
destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination
completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler
可以自行更新到最新版本的AFN或者使用KVO监听progress,progress是一个NSProgress实例
NSProgress *progress;
[manager downloadTaskWithRequest:request progress:&progress destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {...
[progress addObserver:self forKeyPath:@"fractionCompleted" options:NSKeyValueObservingOptionNew context:NULL];
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context{
if ([keyPath isEqualToString:@"fractionCompleted"] && [object isKindOfClass:[NSProgress class]]) {
NSProgress *progress = (NSProgress *)object;
NSLog(@"总大小：%lld,当前大小:%lld",progress.totalUnitCount,progress.completedUnitCount);
}
}
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