我在使用时遇到问题
if let wd = UIApplication.shared.delegate?.window {
var vc = wd!.rootViewController
如果我将这段代码放在 Dispatch 中，警告消息会消失，但应用程序无法正确显示。如果我删除调度，我会收到警告消息。
UIWindow.rootViewController 只能在主线程中使用
和
UIApplication.delegate 只能在主线程中使用
该类专门用于使用进度条进行下载。
public func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
print("Download finished: \(location)")
...
do {
let result = try FileManager.default.replaceItemAt(URL(fileURLWithPath: Constants.Path.temp.stringByAppendingPathComponent(path: "temp.zip")), withItemAt: URL(fileURLWithPath: location.path))
let source = Constants.Path.tempZipFile
let destination = Constants.Path.temp.stringByAppendingPathComponent(path: "dezipped")
var myDict = [String:Any]()
myDict["source"] = source
myDict["destination"] = destination
DispatchQueue.main.async { //IF I REMOVE THIS => PB OR THREAD IN MAIN
if let wd = UIApplication.shared.delegate?.window {
var vc = wd!.rootViewController
if(vc is UINavigationController){
vc = (vc as! UINavigationController).visibleViewController
}
if(vc is WebViewController){
NotificationCenter.default.post(name: .DeflatSynchroFilesWebView, object: myDict, userInfo: nil)
}
else
{
NotificationCenter.default.post(name: .DeflatSynchroFiles, object: myDict, userInfo: nil)
}
}
}
} catch let writeError as NSError {
print("error writing file temp.zip to temp folder")
}
如何在不干扰我的应用程序的情况下删除警告？
提前致谢。