- (IBAction)downLoad:(id)sender {
if(_downloadTask) {
//重复点击按钮不会有重叠动作
return;
}else{
//路径
NSURL*url = [NSURL URLWithString:@"http://localhost:8080/UpLoad/myMusic.mp3"];
//对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//创建会话
NSURLSession *session = [NSURLSessionsessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:nil];
//下载任务NSURLSessionDownloadTask
_downloadTask= [session downloadTaskWithRequest:request completionHandler:nil];
[_downloadTask resume];
}
}
#pragma mark -- NSURLSessionDownloadDelegate
//控制下载进度的
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite {
NSLog(@"本次下载字节数:%lld已经下载字节数: %lld总共字节数:%lld",bytesWritten,totalBytesWritten,totalBytesExpectedToWrite);
//回主线程刷新UI
dispatch_async(dispatch_get_main_queue(), ^{
self.progressView.progress= (float)totalBytesWritten / totalBytesExpectedToWrite;
});
}
//下载完成调用存放在临时文件路径
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL*)location {
//location临时文件路径我们下载的文件出了该代理方法之后就会被移除掉,所以如果想保存文件,需要移动文件到其他路径
NSLog(@"location ----> %@",location);
//_downloadTask.response.suggestedFilename服务器中文件的名字
NSLog(@"++++%@",_downloadTask.response.suggestedFilename);
//移动文件到沙盒的Documents文件下
NSString *filePath = [NSHomeDirectory() stringByAppendingString:@"/Documents"];
//拼接
NSString *file = [filePath stringByAppendingPathComponent:_downloadTask.response.suggestedFilename];
//移动
NSFileManager *manager = [NSFileManager defaultManager];
[managermoveItemAtPath:location.path toPath:file error:nil];
//置空可重复下载
_downloadTask = nil;
}
