小编ika*_*imo的帖子

我在这种模式下创建了一个本地通知:

AppDelegate.m在午餐时间

if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
        // Setup each action thar will appear in the notification
        UIMutableUserNotificationAction *acceptAction = [[UIMutableUserNotificationAction alloc] init];
        acceptAction.identifier = @"ACCEPT_ACTION"; // Identifier is returned in handleActionWithIdentifier: after the user taps on an action
        acceptAction.title = @"ACCEPT_TITLE";
        acceptAction.activationMode = UIUserNotificationActivationModeForeground; //Brings the app into the foreground when action tapped

        UIMutableUserNotificationCategory *not_cat = [[UIMutableUserNotificationCategory alloc] init];
        not_cat.identifier = @"testCategory";

        [not_cat setActions:@[acceptAction] forContext:UIUserNotificationActionContextDefault];

        NSSet *categories = [NSSet setWithObjects:not_cat, nil];

        UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound …

我想读一篇很长的文字:

NSString *text =@"Long test with dot. I want speaching pause when read dot. How can I do?";
AVSpeechSynthesizer *synthesizer = [AVSpeechSynthesizer new];
[synthesizer setDelegate:self];
AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:text];
        utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:[self.defaults objectForKey:LANGUAGE]];
        utterance.rate = 0.28;
        [synthesizer speakUtterance:utterance];

我想合成器检测点并暂停100毫秒.

可能吗？我能怎么做 ？？

我想通过按下按钮将状态栏的颜色从白色更改为黑色,PROGRAMMATICALLY仅在单个ViewController中

这是代码:

- (UIStatusBarStyle)preferredStatusBarStyle {
    NSLog(@"PreferredStatusBarStyle");
    if(nav_bar.alpha==1)
    {
        NSLog(@"->UIStatusBarStyleBlackOpaque");
        return UIStatusBarStyleBlackOpaque;
    }
    else
    {
        NSLog(@"->UIStatusBarStyleLightContent");
        return UIStatusBarStyleLightContent;
    }}

然后,当我按下按钮动作是:

[self setNeedsStatusBarAppearanceUpdate];

但这不起作用!

当我按下按钮日志时,根据navbar.alpha写入正确的状态,但状态栏文本颜色保持UIStatusBarStyleBlackOpaque,就像出现视图时一样.