新情況

更新到XCode11之后，老項(xiàng)目沒關(guān)系，但是新建項(xiàng)目，和以前完全不一樣了。增加了SceneDelegate，據(jù)說是為了iPad的多進(jìn)程準(zhǔn)備的。

image.png

AppDelegate.m中增加了關(guān)于SceneDelegate的函數(shù)。

#pragma mark - UISceneSession lifecycle


- (UISceneConfiguration *)application:(UIApplication *)application configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession options:(UISceneConnectionOptions *)options {
    // Called when a new scene session is being created.
    // Use this method to select a configuration to create the new scene with.
    return [[UISceneConfiguration alloc] initWithName:@"Default Configuration" sessionRole:connectingSceneSession.role];
}


- (void)application:(UIApplication *)application didDiscardSceneSessions:(NSSet<UISceneSession *> *)sceneSessions {
    // Called when the user discards a scene session.
    // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
    // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
}

去掉不需要的SceneDelegate

如果沒有多進(jìn)程需求，那么還是去掉這個(gè)多余的SceneDelegate比較好。

• 直接刪除SceneDelegate文件，包括.h,.m

• 刪除info.plist中的Application Scene Manifest選項(xiàng)

• 刪除AppDelegate.m中關(guān)于SceneDelegate的函數(shù)。

• 在AppDelegate.h中添加window屬性

@property (strong, nonatomic) UIWindow *window;

沒有window屬性，會(huì)導(dǎo)致黑屏

• 設(shè)置最低支持版本，比如9.0；最好不要用8.0，太低了，有未知的問題。

image.png

多進(jìn)程等以后成熟了再說，并且最低支持版本最好是iOS13