官网讲解的很细致
https://allseeing-i.com/ASIHTTPRequest/
下面记录一下项目中遇到的坑
由于需要检测文件的下载速度,所以需要实现
-(void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data
// 接收到服务器返回的数据时调用(数据量比较大的时候,这个方法会被调用多次,每次只能拿到部分数据)
当实现方法后,下载的文件并不能自己保存,需要在下载完成的方法中做处理
-(void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data
{
// 将返回的数据进行拼接
[self.finishData appendData:data];
self.receiveSize += data.length;
float progress = (float)self.receiveSize;
self.receiveSizeLabel.text = [NSString stringWithFormat:@" 接收: %.2f MB",progress / 1000 /1000];
self.netWorkManager.speed = [NSString stringWithFormat:@"%.2f",(float)[ASIHTTPRequest averageBandwidthUsedPerSecond]/1000];
}
// 请求结束的时候调用(在该方法中拿到最终的数据)
-(void)requestFinished:(ASIHTTPRequest *)request
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *folderPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).lastObject stringByAppendingPathComponent:K_DOWNLOAD_DOCS_PATH];
if(![fileManager fileExistsAtPath:folderPath])
{
[fileManager createDirectoryAtPath:folderPath withIntermediateDirectories:YES attributes:nil error:nil];
}
NSString *filename = [folderPath stringByAppendingPathComponent:@"test.pdf"];
[fileManager createFileAtPath:filename contents:self.finishData attributes:nil];
[HUD showSuccessWithStatus:@"下载完成"];
}