UIApplication基础

获取应用程序的象征

UIApplication *app = [UIApplication sharedApplication];

1.设置应用程序图标的提醒数字

app.applicationIconBadgeNumber = 10;

创建通知对象

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

注册用户通知

[app registerUserNotificationSettings: setting];

2.设置联网提示

app.networkActivityIndicatorVisible = YES;

3.设置状态栏

//在iOS7之后，默认交给控制器管理

//app.statusBarHidden = YES;

在viewController里，实现下面方法

- (Bool)prefersStatusBarHidden{ return YES;}

4.打电话，发短信，打开网页

//URL:资源的唯一标识符

[app openURL:[NSURL URLWithString:@“ http://www.baidu.com”]];