推送通知的处理-跳转不同界面 - (Obj-C)

界面搭建:

搭建界面.png

根控制器为一个UITabBarController ,TabBar有两个子视图,分别是两个ViewController:Page1和Page2,接下来需要实现的功能是,应用发送本地通知,接收到通知后,点击打开应用,切换到Page2

发送通知代码:

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

// 创建本地通知
- (IBAction)StartLocalNoteButtonClick:(id)sender {
    
    // 创建本地通知
    UILocalNotification *localNotification = [[UILocalNotification alloc]init];
    
    // 设置属性
    // 1.触发事件
    localNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:5];
    // 2.设置通知的显示内容
    localNotification.alertBody = @"收到一条新消息";
    
    // 设置传递的信息
    localNotification.userInfo = @{@"page":@1};
    
    // 预定通知(UIApplication 作为系统和应用的桥梁,一般负责应用和系统相关的工作)
    // iOS 8.0以后,在预定和展示通知之前必须要注册通知,请求授权
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
    
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 注册通知,请求授权
    /*
         UIUserNotificationTypeNone  无任何效果
         UIUserNotificationTypeBadge 通知含有角标
         UIUserNotificationTypeSound 带声音
         UIUserNotificationTypeAlert 提示文字
     */
    UIUserNotificationSettings *notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];
    
}


@end

AppDelegate代理中接收本地通知:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    /*
         NSString *const UIApplicationLaunchOptionsURLKey;
         NSString *const UIApplicationLaunchOptionsSourceApplicationKey;
         NSString *const UIApplicationLaunchOptionsRemoteNotificationKey;
         NSString *const UIApplicationLaunchOptionsLocalNotificationKey;
         NSString *const UIApplicationLaunchOptionsAnnotationKey;
         NSString *const UIApplicationLaunchOptionsLocationKey;
         NSString *const UIApplicationLaunchOptionsNewsstandDownloadsKey;
         NSString *const UIApplicationLaunchOptionsBluetoothCentralsKey;
         NSString *const UIApplicationLaunchOptionsBluetoothPeripheralsKey;
         NSString *const UIApplicationLaunchOptionsShortcutItemKey;
         NSString *const UIApplicationLaunchOptionsUserActivityDictionaryKey;
         NSString *const UIApplicationLaunchOptionsUserActivityTypeKey;
     */
    UILocalNotification *notification = launchOptions[UIApplicationLaunchOptionsLocalNotificationKey];
    [self showLocalPage:notification];
    
    return YES;
}

/**
 *  当已经接收到本地通知后调用 (应用在后台时,点击通知进入应用后调用,应用在前台时,直接接收到通知但是没有视图变化)
 *
 *  @param application  应用对象
 *  @param notification 接收到的本地通知
 */
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    
    [self showLocalPage:notification];
    
}

- (void)showLocalPage:(UILocalNotification *)localNotification{
    
    UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
    if ([localNotification.userInfo[@"page"] integerValue] == 1) {
        tabBarController.selectedIndex = 1;
    } else {
        tabBarController.selectedIndex = 0;
    }
}

打开应用后,跳转到Page2页面:

接收本地通知.png

打开应用.png

获取本地通知后,判断传递的信息,通过判断结果选择显示的界面

如果传递的参数范围比较多,可以使用Switch进行判断,之所以使用数值类型,是因为字符串判断性能比较差

• 因为程序在前后台时都能获取到通知,在前台接收到了通知也会进行切换界面,这样用户体验并不好,所以还需要对应用的状态进行判断,再决定是否执行页面跳转:

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    
    /*
         UIApplicationStateActive,     活跃状态/前台
         UIApplicationStateInactive,   非活跃状态(电话打断的一瞬间)
         UIApplicationStateBackground  后台(应用接收到通知并点击点击通知进入app时,处于该状态)
     */
    if (application.applicationState != UIApplicationStateActive ){
        
        [self showLocalPage:notification];
    }
    
}

这样当应用处于前台状态时,就不会进行页面跳转了