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标题: ios - 从复杂的 C 方法调用 Objective-C 方法？ [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-12 22:17
标题: ios - 从复杂的 C 方法调用 Objective-C 方法？

我设置了一组方法来使设备的屏幕变暗和变亮，并在设备正在充电/不充电时在 View 上引入黑色 UIView。

我面临的挑战是从用于检查设备是否正在充电的 C 方法调用我的 Obj C 方法(brightenScreen 和 dimScreen)。

任何输入/帮助将不胜感激!

-(void)setUpChargingCheck{

    [[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

    // Do whatever you want...
    if ([[UIDevice currentDevice] batteryState] != UIDeviceBatteryStateUnplugged){
        [self brightenScreen];
    }else{
        [self dimScreen];
    }

    // Registering for a specific notification
    NSString *notificationName = @"com.apple.springboard.fullycharged";
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                    NULL,
                                    yourCustomMethod,
                                    (__bridge CFStringRef)notificationName,
                                    NULL,
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

}

// The custom method that will receive the notification
static void yourCustomMethod(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
{
    NSString *nameOfNotification = (__bridge NSString*)name;

    if([nameOfNotification isEqualToString"com.apple.springboard.fullycharged"])
    {
        if ([[UIDevice currentDevice] batteryState] != UIDeviceBatteryStateUnplugged){
            [[UIScreen mainScreen] setBrightness:1.0];
            // brighten screen here
        }else{
            [[UIScreen mainScreen] setBrightness:0.0];
            // dim screen here
        }
    }
}

-(void)dimScreen{
    [[UIScreen mainScreen] setBrightness:1.0];
    [self.blackoutView removeFromSuperview];
}

-(void)brightenScreen{
    CGFloat width = [UIScreen mainScreen].bounds.size.width;
    CGFloat height = [UIScreen mainScreen].bounds.size.height;

    [[UIScreen mainScreen] setBrightness:0.0];
    self.blackoutView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, width, height)];
    [self.blackoutView setBackgroundColor:[UIColor blackColor]];
    [self.view addSubview:self.blackoutView];
}

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Best Answer-推荐答案

    YourClass *yourClassObject = (__bridge YourClass *)(observer);
    [yourClassObject dimScreen];

关于ios - 从复杂的 C 方法调用 Objective-C 方法？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39729082/

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