音频下载
- (void)requestMp3forNews:(NSString *)mp3String
{
self.progress = 0;
NSURL * url = [NSURL URLWithString:mp3String];
NSURLRequest * urlRequest = [NSURLRequest requestWithURL:url];
[NSURLConnectionconnectionWithRequest:urlRequest delegate:self];//异步下载
self.mp3Url = mp3String;
}
#pragma mark - NSURLConnectionDataDelegate
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
_receiveData = [[NSMutableData alloc] init];
_allLength = [response expectedContentLength];//获取文件的大小
self.response = response;
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[_receiveDataappendData:data];//下载文件的数据，下载的数据大小越来越多
//改变进度条值
if (_allLength) {
self.progress = [_receiveDatalength]/(double)_allLength;//下载比例
}
if (self.delegate && [self.delegate respondsToSelector:@selector(downloadAudio:)]) {
[self.delegate downloadAudio:self];
}
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
/*
将下载好的数据写入沙盒的Documents下
*/
NSString * docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];//沙盒的Documents路径
NSLog(@"+++++docPath = %@",docPath);
NSString *filePath=[docPath stringByAppendingPathComponent:[self.response suggestedFilename]];
NSLog(@"+++++filePath = %@",filePath);//带音频文件的所有路径
[_receiveDatawriteToFile:filePath atomically:YES];//将文件路径写到文件里
self.filePath = filePath;
if (self.filePath &&self.delegate && [self.delegate respondsToSelector:@selector(downloadAudio:isDownLoad:)]) {
[self.delegatedownloadAudio:selfisDownLoad:YES];
}
}
#pragma mark - NSURLConnectionDelegate
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
//下载发生错误
if (self.delegate && [self.delegate respondsToSelector:@selector(downloadAudio:isDownLoad:)]) {
[self.delegatedownloadAudio:selfisDownLoad:NO];
}
if (error) {
NSLog(@"%@",[error localizedDescription]);
}
}
