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  • iOS开发小技巧--iOS中设置applicationIconBadgeNumber遇到的问题

    iOS中设置applicationIconBadgeNumber

    • 在iOS7中直接设置applicationIconBadgeNumber没有问题,但是在iOS8之后设置applicationIconBadgeNumber,程序没有反应.
    • 因为在iOS8之后想要设置applicationIconBadgeNumber,需要用户授权,在iOS8中,需要加上下面的代码:
    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
    
    • 但是这两句如果在iOS7的系统中运行的话就会报错,所以需要先判断iOS的版本,完整代码如下:
    float version = [[[UIDevice currentDevice] systemVersion] floatValue];
    
    if (version >= 8.0) {
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
    }
    
    • 如果是注册消息推送的话,需要这样写:
    float version = [[[UIDevice currentDevice] systemVersion] floatValue];
    
    if (version >= 8.0) {
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
        [application registerForRemoteNotifications];
    }
    
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  • 原文地址:https://www.cnblogs.com/gchlcc/p/5740117.html
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