AFNetworking的POST上传

- (void)download {
// 1.创建网络管理者
// AFHTTPSessionManager 基于NSURLSession
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
// 2.利用网络管理者下载数据
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_01.mp4"]];
/*
destination
- targetPath: 系统给我们自动写入的文件路径
- block的返回值, 要求返回一个URL, 返回的这个URL就是剪切的位置的路径
completionHandler
- url :destination返回的URL
*/
/*
@property int64_t totalUnitCount; 需要下载文件的总大小
@property int64_t completedUnitCount; 当前已经下载的大小
*/
NSProgress *progress = nil;
NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:&progress destination:^ NSURL * (NSURL * targetPath, NSURLResponse * response) {
NSLog(@"targetPath = %@", targetPath.absoluteString);
NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
NSString *toPath = [path stringByAppendingPathComponent:response.suggestedFilename];
NSLog(@"toPath = %@", toPath);
return [NSURL fileURLWithPath:toPath];
} completionHandler:^ void(NSURLResponse * response, NSURL * url, NSError * error) {
// NSLog(@"下载完毕 url = %@", url.absoluteString);
}];
// 给Progress添加监听 KVO
[progress addObserver:self forKeyPath:@"completedUnitCount" options:NSKeyValueObservingOptionNew context:nil];
// 3.启动任务
[task resume];
NSLog(@"%lld, %lld", progress.totalUnitCount, progress.completedUnitCount);
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(NSProgress *)progress change:(NSDictionary *)change context:(void *)context {
// NSLog(@"%lld, %lld", progress.totalUnitCount, progress.completedUnitCount);
NSLog(@"%f", 1.0 * progress.completedUnitCount / progress.totalUnitCount);
}