iOS远程推送主要流程为:注册推送的token,把token上传到服务器->接收到服务器的推送->处理推送。
注册token时,需要用户同意授权进行推送,否则不能获取token,则推送功能无法实现。
远程推送的框架在iOS10之后有更新,因此如果要兼容iOS10之前的系统,则需要进行判断系统版本。
1、注册推送的token并上传
首先打开项目的推送功能,如下图:
然后实现注册token的方法,代码如下:
//iOS10之后需要引入新框架
#ifdef NSFoundationVersionNumber_iOS_9_x_Max
#import <UserNotifications/UserNotifications.h>
#endif
- (void)replyPushNotificationAuthorization:(UIApplication *)application{
if ([[UIDevice currentDevice].systemVersion floatValue] >= 10.0) {
//iOS 10 later
UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
//必须写代理,不然无法监听通知的接收与点击事件
center.delegate = self;
[center requestAuthorizationWithOptions:(UNAuthorizationOptionBadge | UNAuthorizationOptionSound | UNAuthorizationOptionAlert) completionHandler:^(BOOL granted, NSError * _Nullable error) {
if (!error && granted) {
//用户点击允许
NSLog(@"PushNotification====注册成功");
}else{
//用户点击不允许
NSLog(@"PushNotification====注册失败");
}
}];
//获取通知注册状态
// [center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
// NSLog(@"PushNotification====%@",settings);
// }];
}else if ([[UIDevice currentDevice].systemVersion floatValue] >8.0){
//iOS 8 - iOS 9系统
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil];
[application registerUserNotificationSettings:settings];
}
//注册远端消息通知获取device token
[application registerForRemoteNotifications];
}
我们然后在AppDelegate里面实现两个代理方法,在第一次申请token时,需要取得用户的同意,会弹出推送权限申请对话框,当用户同意后会调用token申请成功的代理方法,当用户拒绝后会调用token申请失败的方法。代码如下:
#pragma mark - 授权申请token回调
//token获取成功
- (void) application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
NSData *apnsToken = [NSData dataWithData:deviceToken];
NSString *tokenString = [self getHexStringForData:apnsToken];
NSLog(@"My token = %@", tokenString);
}
- (NSString *)getHexStringForData:(NSData *)data {
NSUInteger length = [data length];
char *chars = (char *)[data bytes];
NSMutableString *hexString = [[NSMutableString alloc] init];
for (NSUInteger i = 0; i < length; i++) {
[hexString appendString:[NSString stringWithFormat:@"%0.2hhx", chars[i]]];
}
return hexString;
}
//token获取失败
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
NSLog(@"did Fail To Register For Remote Notifications With Error: %@", error);
}
当我们token获取成功后,把token上传到服务器,服务器即可根据token及相关参数可以进行推送。上传根据自己的后台服务器接口进行上传即可。
2、接收到推送及处理
接收到推送时的情况有几种,如下:
APP在没有启动及在后台的情况下收到推送,此时会在通知栏进行显示;
APP在前台收到推送,此时会调用收到推送的方法,是否显示由代码决定。
当用户点击推送时,我们也需要进行处理,此时调用的代理方法也有区别,处理推送的流程如下图(对应推送的处理,我们也需要区分iOS10及iOS10之前的系统):
我们在AppDelegate实现相关代理方法,即可处理相应的推送,代码如下:
#pragma mark - function 1
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self replyPushNotificationAuthorization:application];
NSLog(@"launchOptions == %@",launchOptions);
return YES;
}
#pragma mark - function 2 iOS 10之前以前的用户
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
NSLog(@"push notification did receive remote notification:%@", userInfo);
completionHandler(UIBackgroundFetchResultNewData);
}
#pragma mark - function 3 iOS10及以后的用户
- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
NSLog(@"push notification did receive remote notification:%@",notification.request.content.userInfo);
// 需要执行这个方法,选择是否提醒用户,有Badge、Sound、Alert三种类型可以设置,决定是否再显示此通知来提醒用户
completionHandler(UNNotificationPresentationOptionBadge|UNNotificationPresentationOptionSound|UNNotificationPresentationOptionAlert);
}
#pragma mark - function 4 iOS10及以后的用户
- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)(void))completionHandler {
NSLog(@"push notification did receive remote notification:%@",response.notification.request.content.userInfo);
completionHandler();
}
对于接收到的推送处理完毕后,一个推送就形成了闭合,完成了它的使命。
Demo地址:https://github.com/XMSECODE/ESCPushNotificationDemo