我正在处理一个项目,我的UIWebview类需要从我的DownloadView类
执行一个方法我正在使用开源项目https://github.com/robertmryan/download-manager
当此代码执行方法时:
DownloadTableView *download = [[DownloadTableView alloc] init];
[download queueAndStartDownloads:_downloadURL];
这一行没有设置权限
self.downloadManager = [[DownloadManager alloc] initWithDelegate:self];
整个开始下载方法
- (void)queueAndStartDownloads:(NSURL *)url
{
NSString *documentsPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
NSString *downloadFolder = [documentsPath stringByAppendingPathComponent:@"downloads"];
if ([[NSFileManager defaultManager] fileExistsAtPath:downloadFolder]) //Does file exist?
{
if (![[NSFileManager defaultManager] createDirectoryAtPath:downloadFolder
withIntermediateDirectories:NO
attributes:nil
error:nil]) {
}
}
self.downloadManager = [[DownloadManager alloc] initWithDelegate:self];
self.downloadManager.maxConcurrentDownloads = 4;
NSString *downloadFilename = [downloadFolder stringByAppendingPathComponent:[url lastPathComponent]];
[self.downloadManager addDownloadWithFilename:downloadFilename URL:url];
self.cancelButton.enabled = YES;
self.startDate = [NSDate date];
NSLog(@"DOwnling");
[self.downloadManager start];
}
我的DownloadView类中的方法不会执行
- (void)didFinishLoadingAllForManager:(DownloadManager *)downloadManager
{
答案 0 :(得分:1)
假设您的代码在ARC下,我从代码中了解到DownloadTableView *download
是一个局部变量。因此,DownloadTableView
对象在声明结束的方法范围之后被释放。因此,委托方法不会被调用,因为委托被释放。为避免这种情况,您可以将DownloadTableView
对象创建为实例变量。