UISceneDelegate
在
Xcode11中新建项目，发现从iOS13开始，AppDelegate中不再管理Window，而是将功能迁移到了SceneDelegate中。-
首先看一下
info.plist的变化
enable Multipe Windows--- 是否允许分屏Scene Configuratiton--- 屏幕配置项Application Session Role--- 程序屏幕配置规则（为每个Scene指定规则）Configuration Name--- 配置名称Delegate Class Name--- 代理类名称Storyboard Name---Storyboard名称
- 根据上面配置，我们可以解读为，创建项目时，系统默认为我们做了设置，一个名为
Default Configuratiton的默认配置，代理类名称为SceneDelegate,入口名为Main的Storyboard， -
AppDelegate中代码如下
#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];
}
那么问题来了，想要自定义Window,不通过Storyboard创建，该如何操作?
在iOS13及以上系统
- 如果继续使用
SceneDelegate，需要将info.plist中的Storyboard Name选项删除（即不指定Storyboard） -
SceneDelegate中代码修改如下：
- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
if (@available(ios 13, *)) {
if (scene) {
self.window = [[UIWindow alloc] initWithWindowScene:(UIWindowScene *)scene];
self.window.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:[[ViewController alloc]init]];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
}
}
}
低于iOS13的系统
- 删除
info.plist文件中的Application Scene Manifest选项 - 删除
SceneDelegate文件 - 删除
AppDelegate中的SceneDelegate方法 -
AppDelegate.h中添加
@property (strong, nonatomic) UIWindow *window;
-
AppDelegate修改代码如下：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
ViewController * vc = [[ViewController alloc]init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
return YES;
}
