第一、首先要保证你的xcode是最新的啰嗦几句:上周吧，我们Xcode更新到了11.0，有的人可能还没有发现，新建的项目中多了一个场景代理类目#import "SceneDelegate.h"，至于怎么用的，我目前还没有定论。你们可以尝试一下，新建一个项目工程，在ViewController里面写一个按钮buton渲染界面，用真机调试一下，再用模拟器调试一下，手机调试会出现黑屏，模拟器呢，会出现button按钮，现在公司项目都是之前写好的，可能不会存在这样问题。下面就一一看下问题
Xcode11.0 2019-09-27 20.18.27.png
屏幕快照 2019-09-27 20.21.37.png
项目创建完之后，项目中多了一个场景代理类目，至于怎么用的，鉴于刚发现，还再研究中
屏幕快照 2019-09-27 20.14.16.png
今天下午我新建一个工程想写一个波浪效果，发现了以上问题及以下问题，我把运行的截图发一下
自己的手机上调试的结果 2019-09-27 20.25.21.png
这是模拟器运行的效果，模拟器是没问题的
模拟器上运行的 2019-09-27 20.26.15.png
一、解决办法一(以失败告终)在AppDelegate引入
#import "AppDelegate.h"
#import "ViewController.h"
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
// 测试写一下 没有效果 我写的两个波浪没有了
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
ViewController *home = [[ViewController alloc] init];
_navController = [[UINavigationController alloc] initWithRootViewController:home];
[_navController.navigationBar setBackgroundColor:[UIColor blueColor]];
[self.window setRootViewController:_navController];
// self.window.rootViewController = home;
[self.window makeKeyAndVisible];
// 添加这个运行之后会报错
return YES;
}
这个方法第一件想到要加上的，可是不行，解决办法是不行的毕竟刚出啦，有没有相关的说明及解释
二、遇到的场景代理类目#import "SceneDelegate.h"
#import
@interface SceneDelegate : UIResponder
@property (strong, nonatomic) UIWindow * window;
@end
#import "SceneDelegate.h"
@interface SceneDelegate ()
@end
@implementation SceneDelegate
- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
// 使用此方法可选地配置并将UIWindow ' window '附加到提供的UIWindowScene ' scene '。
// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
// 这个委托并不意味着连接的场景或会话是新的(请参见“application:configurationForConnectingSceneSession”)。
}
- (void)sceneDidDisconnect:(UIScene *)scene {
// Called as the scene is being released by the system.
// 当场景被系统释放时调用。
// This occurs shortly after the scene enters the background, or when its session is discarded.
// 这发生在场景进入后台后不久，或者当它的会话被丢弃时。
// Release any resources associated with this scene that can be re-created the next time the scene connects.
// 释放与此场景关联的任何资源，这些资源可以在下一次场景连接时重新创建。
// The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
// 场景稍后可能重新连接，因为它的会话没有必要被丢弃(请参见“application: diddiscardscenes”)。
}
- (void)sceneDidBecomeActive:(UIScene *)scene {
// Called when the scene has moved from an inactive state to an active state.
// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}
- (void)sceneWillResignActive:(UIScene *)scene {
// Called when the scene will move from an active state to an inactive state.
// This may occur due to temporary interruptions (ex. an incoming phone call).
}
- (void)sceneWillEnterForeground:(UIScene *)scene {
// Called as the scene transitions from the background to the foreground.
// Use this method to undo the changes made on entering the background.
}
- (void)sceneDidEnterBackground:(UIScene *)scene {
// Called as the scene transitions from the foreground to the background.
// Use this method to save data, release shared resources, and store enough scene-specific state information
// to restore the scene back to its current state.
}
@end
昨天群里有人说可以在SceneDelegate添加WaterWaveView
我早上试了下，不行
#import "SceneDelegate.h"
#import "ViewController.h"
@interface SceneDelegate ()
@end
@implementation SceneDelegate
- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
// 测试写一下 没有效果 模拟器和真机全都黑屏
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
ViewController *home = [[ViewController alloc] init];
_navController = [[UINavigationController alloc] initWithRootViewController:home];
[_navController.navigationBar setBackgroundColor:[UIColor blueColor]];
[self.window setRootViewController:_navController];
// self.window.rootViewController = home;
[self.window makeKeyAndVisible];
}
2019.9.29
NSLog(@"我走到这里了_____01") 2019-09-29 09.24.39.png
提示UINavigationController为nil，本来就没有设置
NSLog(@"我走到这里了_____01");
self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor=[UIColor whiteColor];
[self.window makeKeyAndVisible];
ViewController *root=[[ViewController alloc]init];
self.window.rootViewController=root;
我又试着把SceneDelegate.h.m两个文件删除依然没有用
解决办法:
#import
@interface AppDelegate : UIResponder
@property (strong, nonatomic) UIWindow * window; //添加即可解决
@end
SceneDelegate这个东西是管理window的，为了iPadOS的多进程准备的(可以同时开启多个相同App)
有道翻译了下，还是不会用，脑袋有瑕疵啊，哎，有大佬会用的可以评论里指点一二，拜谢！！！！！
本文代码地址:https://github.com/ZongAng123/TheWaves.git
本人微信:zaxm1993