iOS学习—读取粘贴板上的数据，并实现跳转指定界面

iOS提供读取剪切板数据的方法

UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
NSLog(@"pasteboard = %@", pasteboard.string);//使用.string可以输出复制的内容

首先声明是否已经跳转

@property (nonatomic, assign) BOOL isPushed;

在AppDelegate文件中的

- (void)applicationDidBecomeActive:(UIApplication *)application{ }函数书写需要跳转的操作

//APP进入活跃状态
- (void)applicationDidBecomeActive:(UIApplication *)application {
    UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
    NSLog(@"pasteboard = %@", pasteboard.string);
    UIWindow *window = [[[UIApplication sharedApplication] windows] objectAtIndex:0];
    if ([pasteboard.string containsString:@"http"]) {
        if (!_isPushed) {
            [(UINavigationController *)window.rootViewController pushViewController:[SecondViewController new] animated:YES];
            _isPushed = YES;
        }
    }
}

我们可以熟悉一下delegate中的操作

这里首先要弄懂APPdelegate中的这几个代理方法的意思

//App已经启动
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    return YES;
}
 
//App挂起状态
- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}
 
//APP进入后台
- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
 
//APP将重新回到前台
- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}
 
//APP进入活跃状态
- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
 
//系统时间发生改变时执行
- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}