UIApplication单例
[UIApplication sharedApplication];你的app单例对象
int main(int argc, char *argv[])
{
@autoreleasepool {
//UIApplicationMain函数会为你的app创建一个全局的UIApplication单例对象.
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}
UIApplication应用级方法
- 设置应用程序图标右上角的红色提醒数字
@property(nonatomic) NSInteger applicationIconBadgeNumber;
代码实现：
UIApplication *app = [UIApplication sharedApplication];
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];
- 设置联网指示器的可见性
@property(nonatomic,getter=isNetworkActivityIndicatorVisible) BOOL networkActivityIndicatorVisible;
代码实现:
app.networkActivityIndicatorVisible= YES;
- 管理状态栏
从iOS7开始，系统提供了2种管理状态栏的方式
a.(推荐)通过UIViewController管理（每一个UIViewController都可以拥有自己不同的状态栏）在iOS7中，默认情况下，状态栏都是由UIViewController管理的，UIViewController实现下列方法就可以轻松管理状态栏的可见性和样式
状态栏的样式 - (UIStatusBarStyle)preferredStatusBarStyle;
状态栏的可见性 -(BOOL)prefersStatusBarHidden;
#pragma mark-设置状态栏的样式
-(UIStatusBarStyle)preferredStatusBarStyle
{
//设置为白色
//return UIStatusBarStyleLightContent;
//默认为黑色
return UIStatusBarStyleDefault;
}
#pragma mark-设置状态栏是否隐藏（否）
-(BOOL)prefersStatusBarHidden
{
return NO;
}
注意:UINavigationController下的childViewController若要控制状态栏，需写一个UINavigationController的子类，重写childViewControllerForStatusBarStyle方法。
- (UIViewController *)childViewControllerForStatusBarStyle{
return self.topViewController;
}
b.通过UIApplication管理（一个应用程序的状态栏都由它统一管理）如果想利用UIApplication来管理状态栏，首先得修改Info.plist的设置，添加选中行，并设置为NO即可，这篇文章中有详细介绍iOS中用application 来管理电池栏状态
代码：
//通过sharedApplication获取该程序的UIApplication对象
UIApplication *app=[UIApplication sharedApplication];
//设置状态栏的样式
//app.statusBarStyle=UIStatusBarStyleDefault;//默认（黑色）
//设置为白色+动画效果
[app setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];
//设置状态栏是否隐藏
app.statusBarHidden=YES;
//设置状态栏是否隐藏+动画效果
[app setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];
- openURL:方法
UIApplication有个功能十分强大的openURL:方法
- (BOOL)openURL:(NSURL*)url;
openURL:方法的部分功能有
UIApplication *app = [UIApplicationsharedApplication];
打电话 [app openURL:[NSURLURLWithString:@"tel://110"]];
发短信 [app openURL:[NSURLURLWithString:@"sms://10086"]];
发邮件 [app openURL:[NSURLURLWithString:@"mailto://[email protected]"]];
打开一个网页资源 [app openURL:[NSURL URLWithString:@"http://www.baidu.com"]];
打开其他app程序 openURL方法，可以打开其他APP。
- 判断程序运行状态
//判断程序运行状态
/*
UIApplicationStateActive,
UIApplicationStateInactive,
UIApplicationStateBackground
*/
UIApplication *app = [UIApplication sharedApplication];
if(app.applicationState ==UIApplicationStateInactive){
NSLog(@"程序在运行状态");
}
- 阻止屏幕变暗进入休眠状态
//阻止屏幕变暗，慎重使用本功能，因为非常耗电。
UIApplication *app = [UIApplication sharedApplication];
app.idleTimerDisabled =YES;
UIApplication Delegate
当app收到干扰，例如程序运行中来电等，就会产生一些系统事件，这时UIApplicaiton会通知它的代理delegate对象，让delegate代理来处理这些系统事件。
delegate可以处理的时间包括
1.应用程序的生命周期事件（如程序启动和关闭）
2.系统事件（如来电）
3.内存警告（用处较多）
AppDelegate监听UIApplication生命周期
// AppDelegate:监听应用程序的生命周期
// 以下方法就是应用程序的生命周期方法
// 应用程序启动完成的时候就会调用AppDelegate的方法
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSLog(@"%s",__func__);
return YES;
}
// 当应用程序失去焦点的时候调用
- (void)applicationWillResignActive:(UIApplication *)application {
NSLog(@"%s",__func__);
}
// 当应用程序进入后台的时候调用
- (void)applicationDidEnterBackground:(UIApplication *)application {
NSLog(@"%s",__func__);
// 保存一些信息
}
// 当应用程序进入前台的时候调用
- (void)applicationWillEnterForeground:(UIApplication *)application {
NSLog(@"%s",__func__);
}
// 当应用程序完全获取焦点的时候调用
// 只有当应用程序完全获取焦点的时候,才能够与用户交互
- (void)applicationDidBecomeActive:(UIApplication *)application {
NSLog(@"%s",__func__);
}
// 当应用程序关闭的时候
- (void)applicationWillTerminate:(UIApplication *)application {
}
//收到内存警告时调用
-(void)applicationDidReceiveMemoryWarning:(UIApplication *)application{
}
AppDelegate获取DeviceToken
DeviceToken用于上传给服务器，服务器向苹果APNs发起推送服务。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//去除编译警告
#pragma clang diagnostic push
#pragma clang diagnostic ignored"-Wdeprecated-declarations"
//注册远程通知
if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerForRemoteNotifications)])
{
UIUserNotificationType types = UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert;
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:types
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
else
{
UIRemoteNotificationType types = UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeBadge;
[[UIApplication sharedApplication] registerForRemoteNotificationTypes:types];
}
#pragma clang diagnostic pop
return YES;
}
//需要注册远程通知才会回调该方法。
- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
NSLog(@"%@",[[[[deviceToken description] stringByReplacingOccurrencesOfString: @"<" withString: @""] stringByReplacingOccurrencesOfString: @">" withString: @""] stringByReplacingOccurrencesOfString: @" " withString: @""]);
//上传给第三方服务器
[[NIMSDK sharedSDK] updateApnsToken:deviceToken];
}
AppDelegate处理其他app打开自己
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation{
BOOL result = [UMSocialSnsService handleOpenURL:url];
if (result == FALSE) {
if ([url.host isEqualToString:@"safepay"]) {
//跳转支付宝钱包进行支付，处理支付结果,此处不处理，留给需要处理的地方
[[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:nil];
}
}
return result;
}
AppDelegate处理点击通知打开
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler{
}
AppDelegate处理屏幕旋转
// 强制旋转
+(void)transtoRotation:(UIDeviceOrientation)deviceOrientation{
// 竖屏点击按钮 旋转到横屏
UIDevice *device = [UIDevice currentDevice] ;
if (UIDeviceOrientationIsLandscape(deviceOrientation)) {
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeLeft] forKey:@"orientation"];
}else{
// 横屏点击按钮, 旋转到竖屏
if (UIDeviceOrientationIsPortrait(device.orientation) && !UIDeviceOrientationIsPortrait([FMHelper shareHelper].deviceOrientation)) {
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeLeft] forKey:@"orientation"];//这句话是防止手动先把设备置为竖屏,导致下面的语句失效.
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationPortrait] forKey:@"orientation"];
}else{
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationPortrait] forKey:@"orientation"];
}
}
}
#pragma mark - 屏幕旋转代理
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
if ([FMHelper isAllowRotation]) {
return UIInterfaceOrientationMaskAllButUpsideDown;
} else {
return UIInterfaceOrientationMaskPortrait;
}
}
-(void)application:(UIApplication *)application didChangeStatusBarOrientation:(UIInterfaceOrientation)oldStatusBarOrientation{
NSLog(@"didChangeStatusBarOrientation");
if ([FMHelper shareHelper].didRotationBlock) {
[FMHelper shareHelper].didRotationBlock(self);
}
}
-(void)application:(UIApplication *)application willChangeStatusBarOrientation:(UIInterfaceOrientation)newStatusBarOrientation duration:(NSTimeInterval)duration{
NSLog(@"willChangeStatusBarOrientation");
[FMHelper setDeviceOrientation:(UIDeviceOrientation)newStatusBarOrientation];
}