断点续传
//播放音乐 视频
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()<NSURLSessionDownloadDelegate>
//session 回话
@property (nonatomic,strong) NSURLSession *currentSession;
//下载任务,下载大文件
@property (nonatomic ,strong)NSURLSessionDownloadTask *downloadTask;
@property (weak, nonatomic) IBOutlet UIProgressView *progressView;
//用于保存 暂停下载时 已经获取的数据
@property (nonatomic ,strong) NSData *resumeData;
@property (nonatomic ,strong) AVPlayer *player;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self.progressView setProgress:0];
NSLog(@"%@",NSHomeDirectory());
[self createButton];
[self downFile];
}
- (void)createButton {
UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(100, 200, 100, 100)];
btn.backgroundColor = [UIColor redColor];
[btn setTitle:@"button" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(btnPressed) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
//暂停下载任务
- (void)btnPressed {
if (self.resumeData) {
//downloadTaskWithResumeData 这个方法需要一个你已经获得data数据
// self.resumeData.length;
_downloadTask = [_currentSession
downloadTaskWithResumeData:self.resumeData];
[_downloadTask resume];
//开始继续下载，就让这个保存数据的变量为空
self.resumeData = nil;
//说明要继续下载
}else {
//
//调用这个方法，可以获得你取消下载那个时候 已经获得的数据 resumeData
[self.downloadTask cancelByProducingResumeData:^(NSData * _Nullable resumeData) {
//保存记录了 下载了多少
self.resumeData = resumeData;
}];
}
}
// 下载一个稍微大一点的 文件
- (void)downFile {
//1.NSURL
// http://111.7.130.207/cache/dldir1.qq.com/qqfile/QQforMac/QQ_V4.0.6.dmg
// NSURL *url = [NSURL URLWithString:@"http://jameswatt.local/123.mp3"];
NSURL *url = [NSURL URLWithString:@"http://111.7.130.207/cache/dldir1.qq.com/qqfile/QQforMac/QQ_V4.0.6.dmg?ich_args=cdd49b3f25f18c0a344aeeb64422b91e_7071_0_0_6_565b6306a1c9920a65071b6b95e85d86e94f9924aa5c09d856daaa6955b1e10b_dc405cb5256640263cf80aef8d9c85c3_1_0&ich_ip="];
//2.NSURLRequest
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.NSURLSessionConfiguration(回话的配置，用的是默认配置)
NSURLSessionConfiguration *config =[NSURLSessionConfiguration defaultSessionConfiguration];
//4.NSURLSession（创建回话）
_currentSession = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];
//5. downloadTaskWithRequest（用回话创建一个下载任务）
_downloadTask = [_currentSession downloadTaskWithRequest:request];
//6.开始任务
[_downloadTask resume];
}
//下载的代理方法
//只要下载结束，或者下载出错，或者下载停止，都会调用
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {
if (error) {
NSLog(@"%@",error);
}else {
NSLog(@"下载完成");
}
}
//执行下载任务的时候，有数据写入
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite {
//totalBytesWritten 已经写了多少数据
//totalBytesExpectedToWrite 总共有多少数据
//下载的进度
double progess = (double)totalBytesWritten / (double)totalBytesExpectedToWrite;
NSLog(@"下载进度%f",progess);
[self.progressView setProgress:progess animated:YES];
}
//只有真正下载完成的时候 才会调用
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location {
NSLog(@"下载完成 %@",location);
//寻找沙盒的 路径
NSString *path = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
//移动的路径
NSString *desPath = [path stringByAppendingPathComponent:@"xxx.mp3"];
// NSURL *pathUrl = [NSURL URLWithString:desPath];
NSURL *pathUrl = [NSURL fileURLWithPath:desPath];
NSFileManager *fileManager = [NSFileManager defaultManager];
//复制文件到 另一个地方
[fileManager copyItemAtURL:location toURL:pathUrl error:nil];
NSLog(@"%@",desPath);
//用于播放音乐
_player = [AVPlayer playerWithURL:pathUrl];
// [_player play];
}