iOS 10/9 推送通知
<p><p>我需要更新我们的应用程序以支持 iOS 9 和 iOS 10，所以我的问题是使用 <em>UNUserNotificationCenter</em> 进行推送通知。</p>
<p>因此，在 iOS 9 中，我们有一个方法可以返回 <em>UIUserNotificationSettings</em> 的结果，例如</p>
<pre><code>- (BOOL)alertEnabled {
UIUserNotificationSettings *theSettings = [ currentUserNotificationSettings];
return & UIUserNotificationTypeAlert;
}
</code></pre>
<p>在 iOS 10 中，我做了类似的事情</p>
<pre><code>- (void)userNotificationsAuthorization :(void (^)(BOOL alertIsActive))completion {
[ getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
completion(settings.alertSetting == UNNotificationSettingEnabled);
}];
}
</code></pre>
<p>调用它并通过完成处理程序获取它。</p>
<p>我的问题:是否有可能使用 <em>getNotificationSettingsWithCompletionHandler</em> 和 <strong>return</strong> 值而不是完成处理程序，我可以将它用于我的 <em>alertEnabled</em > 方法？</p>
<p>非常感谢。</p>
<p>更新:</p>
<p>通过这种方法，它正在工作</p>
<pre><code>- (BOOL)alertIsEnabled {
__block BOOL alertIsActive = NO;
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"10.0")) {
dispatch_semaphore_t sem = dispatch_semaphore_create(0);
[ getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
alertIsActive = settings.alertSetting == UNNotificationSettingEnabled;
dispatch_semaphore_signal(sem);
}];
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
}
else {
UIUserNotificationSettings *theSettings = [ currentUserNotificationSettings];
alertIsActive = & UIUserNotificationTypeAlert;
}
return alertIsActive;
}
</code></pre>
<p>但也许有更好的解决方案</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>所以，经过一周的测试，它对我来说效果很好。</p>
<p>针对我的具体问题，我创建了一个自定义类。</p>
<p><em>SpecicPush.h</em></p>
<pre><code>#import <UIKit/UIKit.h>
typedef NS_ENUM(NSInteger , PushNotificationType) {
PushNotificationTypeNone = 0, // the application may not present any UI upon a notification being received
PushNotificationTypeBadge = 1 << 0, // the application may badge its icon upon a notification being received
PushNotificationTypeSound = 1 << 1, // the application may play a sound upon a notification being received
PushNotificationTypeAlert = 1 << 2, // the application may display an alert upon a notification being received
};
@interface SpecificPush : NSObject
@property (nonatomic, readonly) PushNotificationType currentNotificationSettings;
+ (SpecificPush *)sharedInstance;
- (PushNotificationType)types;
@end
</code></pre>
<p><em>SpecificPush.m</em></p>
<pre><code>#import "SpecificPush.h"
#import <UserNotifications/UserNotifications.h>
@interface SpecificPush()
@property (nonatomic) PushNotificationType currentNotificationSettings;
@end
@implementation SpecificPush
#pragma mark - Init
static SpecificPush *instance = nil;
+ (SpecificPush *)sharedInstance
{
@synchronized (self)
{
if (instance == nil)
{
;
}
}
return instance;
}
- (instancetype)init
{
NSAssert(!instance, @"WARNING - Instance of SpecifishPush already exists");
self = ;
if (self)
{
self.currentNotificationSettings = PushNotificationTypeNone;
}
instance = self;
return self;
}
- (PushNotificationType)types
{
if (IS_IOS10)
{
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
[ getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings *settings) {
if ((settings.soundSetting == UNNotificationSettingDisabled) && (settings.alertSetting == UNNotificationSettingDisabled) && (settings.soundSetting == UNNotificationSettingDisabled))
{
self.currentNotificationSettings = PushNotificationTypeNone;
}
if (settings.badgeSetting == UNNotificationSettingEnabled)
{
self.currentNotificationSettings = PushNotificationTypeBadge;
}
if (settings.soundSetting == UNNotificationSettingEnabled)
{
self.currentNotificationSettings = PushNotificationTypeSound;
}
if (settings.alertStyle == UNNotificationSettingEnabled)
{
self.currentNotificationSettings = PushNotificationTypeAlert;
}
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
dispatch_release(semaphore);
}
else
{
UIUserNotificationSettings *settings = [ currentUserNotificationSettings];
if (settings.types == UIUserNotificationTypeNone)
{
self.currentNotificationSettings = PushNotificationTypeNone;
}
if (settings.types & UIUserNotificationTypeBadge)
{
self.currentNotificationSettings = PushNotificationTypeBadge;
}
if (settings.types & UIUserNotificationTypeSound)
{
self.currentNotificationSettings = PushNotificationTypeSound;
}
if (settings.types & UIUserNotificationTypeAlert)
{
self.currentNotificationSettings = PushNotificationTypeAlert;
}
}
return self.currentNotificationSettings;
}
@end
</code></pre>
<p>我使用了与 UIUserNotificationType 相同的 NS_ENUM。现在我可以轻松使用旧的实现了。 </p>
<pre><code>- (BOOL)alertEnabled {
UIUserNotificationSettings *theSettings = [ currentUserNotificationSettings];
return & UIUserNotificationTypeAlert;
}
</code></pre>
<p>我用</p>
<pre><code>- (BOOL)alertEnabled {
return [ types] & PushNotificationTypeAlert;
}
</code></pre></p>
<p style="font-size: 20px;">关于iOS 10/9 推送通知，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/41564543/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/41564543/
</a>
</p>
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