iOS开发--application用法

• 设置推送信息提醒数量

    //1.获取UIApplication对象

    UIApplication * app=[UIApplication sharedApplication];

    //2.注册用户通知

    UIUserNotificationSettings * notice=[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];

    [app registerUserNotificationSettings:notice];

    //设置提醒值

    app.applicationIconBadgeNumber=10;

• 设置联网状态

    //1.获取UIApplication对象

    UIApplication * app=[UIApplication sharedApplication];

    app.networkActivityIndicatorVisible=YES;

• 设置状态栏

//1.获取UIApplication对象

UIApplication * app=[UIApplication sharedApplication];

//隐藏状态栏

//app.statusBarHidden=NO;

app.statusBarStyle=UIStatusBarStyleLightContent;

• openURL

    //UIApplication有个功能十分强大的openURL:方法

     //1. 获取 UIApplication 对象

    UIApplication * app=[UIApplication sharedApplication];  

    //打电话

    [app openURL:[NSURL URLWithString:@"tel://10086"]];

    //发短信

    [app openURL:[NSURL URLWithString:@"sms://10086"]];

    //发邮件

    [app openURL:[NSURL URLWithString:@"mailto://[email protected]"]];

    //打开一个网页资源

    [app openURL:[NSURL URLWithString:@"https://www.baidu.com"]];