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模拟器收不到UILocalNotification本地通知 - MayGodBlessYou
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<h1>模拟器收不到UILocalNotification本地通知</h1>
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<span class="date">2017/02/24</span>
<span>posted in </span>
<span class="posted-in"><a href='iOS.html'>iOS</a></span>
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<p>通知功能是iOS应用开发经常会碰到的需求，iOS应用的通知分为本地通知和远程通知（即消息推送），Apple develop官网的API Guides对通知的开发有详细的介绍。</p>
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<p>今天我碰到的问题是模拟器收不到本地通知，按照惯例，先上本地通知的代码：</p>
<pre><code class="language-plain_text"> UILocalNotification *note = [[UILocalNotification alloc] init];
note.alertBody = @"Hypnotize";
note.fireDate = date; //这里date 变量是一个NSDate对象，从页面上的UIDatePicker对象上获取的
note.applicationIconBadgeNumber = 1;
[[UIApplication sharedApplication] scheduleLocalNotification:note];
</code></pre>
<p>原本以为这样就可以接收到通知了，结果一运行，始终看不到通知，过了通知的设定时间好久了，也看不到通知。查阅了下通知的用法文档，才知道需要去申请发送通知的授权。修正后的代码如下所示：</p>
<pre><code class="language-plain_text">//判断是否已经授权用户发送通知
if ([[UIApplication sharedApplication] currentUserNotificationSettings].types != UIUserNotificationTypeNone) {
UILocalNotification *note = [[UILocalNotification alloc] init];
note.alertBody = @"Hypnotize";
note.fireDate = date;//这里date 变量是一个NSDate对象，从页面上的UIDatePicker对象上获取的
note.applicationIconBadgeNumber = 1;
[[UIApplication sharedApplication] scheduleLocalNotification:note];
} else{
//用户注册通知，注册后才能收到通知，这会给用户一个弹框，提示用户选择是否允许发送通知
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
}
</code></pre>
<p>用户注册通知后，会收到一个回调函数，一般如果未授权，创建通知就在这个回调函数里进行。</p>
<pre><code class="language-plain_text">//用户注册通知回调函数
- (void)application:(UIApplication *) application
didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings {
if (notificationSettings.types != UIUserNotificationTypeNone) {
NSLog(@"haha");
UILocalNotification *note = [[UILocalNotification alloc] init];
note.alertBody = @"Hypnotize";
note.fireDate = rvc.selectDate;
note.applicationIconBadgeNumber = 1;
[[UIApplication sharedApplication] scheduleLocalNotification:note];
}
}
</code></pre>
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