一、使用说明
采用第三方下载插件MCDownloadManager，
csdn地址 http://download.csdn.net/download/wangxiaoertedaye/10166107
github地址 https://github.com/zxgiOS/MCDownloadManager
两种实现方式
1）分步式，点击下载然后点击打开，可以使用按钮点击下载、查看，
2）一体式，点击直接下载打开，点击之后将URL传入插件调用
MCDownloadReceipt *receipt = [[MCDownloadManager defaultInstance] downloadReceiptForURL:self.url];
根据receipt.state判断是否下载或者直接打开，如果返回已下载就直接调用下述打开方法，未下载则调用下载方法下载完成后打开
二、效果图
三、使用方法
1.设置下载URL，设置进度条
MCDownloadReceipt *receipt = [[MCDownloadManager defaultInstance] downloadReceiptForURL:url];
self.progressView.progress = receipt.progress.fractionCompleted;
2.点击开始下载，download中监听下载进度更新进度条
- (void)downloadBtnAction:(UIButton *)sender{
MCDownloadReceipt *receipt = [[MCDownloadManager defaultInstance] downloadReceiptForURL:self.url];
if (receipt.state == MCDownloadStateDownloading) {//当前正在下载中
[sender setTitle:@"下载" forState:UIControlStateNormal];
[[MCDownloadManager defaultInstance] suspendWithDownloadReceipt:receipt];
}else if (receipt.state == MCDownloadStateCompleted) {//已下载
if ([self.delegate respondsToSelector:@selector(cell:didClickedBtn:)]) {
[self.delegate cell:self didClickedBtn:sender];
}
}else {//未下载
[sender setTitle:@"停止" forState:UIControlStateNormal];
[self download];
}
}
- (void)download {
[[MCDownloadManager defaultInstance] downloadFileWithURL:self.url
progress:^(NSProgress * _Nonnull downloadProgress, MCDownloadReceipt *receipt) {
NSLog(@"%@,%@",receipt.url,self.url);
if ([receipt.url isEqualToString:self.url]) {
self.progressView.progress = downloadProgress.fractionCompleted ;
self.sizeLabel.text = [NSString stringWithFormat:@"%0.2fm/%0.2fm", downloadProgress.completedUnitCount/1024.0/1024, downloadProgress.totalUnitCount/1024.0/1024];
}
}
destination:nil
success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSURL * _Nonnull filePath) {
[self.downloadBtn setTitle:@"查看" forState:UIControlStateNormal];
}
failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
[self.downloadBtn setTitle:@"下载" forState:UIControlStateNormal];
}];
}
3.下载完成查看 传入需要查看文件的URL 插件自动关联已经下载好的(相当于缓存机制，避免重复下载)如果需要下载之后直接打开则在上述download方法下载完成中调用打开方法
- (void)openDocBycell:(DownLoadTableViewCell *)cell{
MCDownloadReceipt *receipt = [[MCDownloadManager defaultInstance] downloadReceiptForURL:cell.url];
//UIViewController *vc = [UIApplication sharedApplication].keyWindow.rootViewController;
self.doc = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:receipt.filePath]];
self.doc.name = @"文档预览";
self.doc.accessibilityNavigationStyle = 2;
self.doc.delegate = self;
[self.doc presentPreviewAnimated:YES];
//[documentVC openFileWithURL:[NSURL fileURLWithPath:receipt.filePath]];
}