iOS 7启动图像(启动画面)淡出

Question

在iOS 7上,启动图像淡出而不是在加载应用程序时立即消失.

是否有任何设置可以阻止此启动图像淡出动画？我需要它立即消失,就像在iOS 6及更早版本中一样.

编辑答案:

是的,可以将启动图像作为UIImageView添加到顶部窗口,并在启动渐变淡化动画后隐藏它.但这会导致0.4秒的延迟,我正试图避免.

Answer 1

我已经设法在AppController中做到这一点.只需在创建glView后立即放置此代码即可

    UIImage* image = [UIImage imageNamed:[self getLaunchImageName]];
if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
{
    float screenScale = [[UIScreen mainScreen] scale];
    if (screenScale > 1.)
        image = [UIImage imageWithCGImage:image.CGImage scale:screenScale orientation:image.imageOrientation];
}
UIImageView *splashView = [[UIImageView alloc] initWithImage:image];
[viewController.view addSubview:splashView];
[splashView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.1f];

这很容易.只需获取启动图像,并在延迟后使其消失.您将需要getLaunchImage代码(基于此评论,未经iPhone 6测试或6 +)

    -(NSString*)getLaunchImageName
{

    NSArray* images= @[@"LaunchImage.png",
                       @"LaunchImage@2x.png",
                       @"LaunchImage-700@2x.png",
                       @"LaunchImage-568h@2x.png",
                       @"LaunchImage-700-568h@2x.png",
                       @"LaunchImage-700-Portrait@2x~ipad.png",
                       @"LaunchImage-Portrait@2x~ipad.png",
                       @"LaunchImage-700-Portrait~ipad.png",
                       @"LaunchImage-Portrait~ipad.png",
                       @"LaunchImage-Landscape@2x~ipad.png",
                       @"LaunchImage-700-Landscape@2x~ipad.png",
                       @"LaunchImage-Landscape~ipad.png",
                       @"LaunchImage-700-Landscape~ipad.png",
                       @"LaunchImage-800-667h@2x.png",
                       @"LaunchImage-800-Portrait-736h@3x.png",
                       @"LaunchImage-800-Landscape-736h@3x.png",
                       ];

    UIImage *splashImage;

    if ([self isDeviceiPhone])
    {
        if ([self isDeviceiPhone4] && [self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[1]];
            if (splashImage.size.width!=0)
                return images[1];
            else
                return images[2];
        }
        else if ([self isDeviceiPhone5])
        {
            splashImage = [UIImage imageNamed:images[1]];
            if (splashImage.size.width!=0)
                return images[3];
            else
                return images[4];
        }
        else if ([self isDeviceiPhone6])
        {
            splashImage = [UIImage imageNamed:images[1]];
            if (splashImage.size.width!=0)
                return images[13];
            else
                return images[14];
        }
        else
            return images[0]; //Non-retina iPhone
    }
    else if ([[UIDevice currentDevice] orientation]==UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown)//iPad Portrait
    {
        if ([self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[5]];
            if (splashImage.size.width!=0)
                return images[5];
            else
                return images[6];
        }
        else
        {
            splashImage = [UIImage imageNamed:images[7]];
            if (splashImage.size.width!=0)
                return images[7];
            else
                return images[8];
        }

    }
    else
    {
        if ([self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[9]];
            if (splashImage.size.width!=0)
                return images[9];
            else
                return images[10];
        }
        else
        {
            splashImage = [UIImage imageNamed:images[11]];
            if (splashImage.size.width!=0)
                return images[11];
            else
                return images[12];
        }
    }
}

-(BOOL)isDeviceiPhone
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
    {
        return TRUE;
    }

    return FALSE;
}

-(BOOL)isDeviceiPhone4
{
    if ([[UIScreen mainScreen] bounds].size.height==480)
        return TRUE;

    return FALSE;
}


-(BOOL)isDeviceRetina
{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(displayLinkWithTarget:selector:)] &&
        ([UIScreen mainScreen].scale == 2.0))        // Retina display
    {
        return TRUE;
    }
    else                                          // non-Retina display
    {
        return FALSE;
    }
}


-(BOOL)isDeviceiPhone5
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone && [[UIScreen mainScreen] bounds].size.height==568)
    {
        return TRUE;
    }
    return FALSE;
}

-(BOOL)isDeviceiPhone6
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone && [[UIScreen mainScreen] bounds].size.height>568)
    {
        return TRUE;
    }
    return FALSE;
}

Answer 2

从 iOS 12 开始，仍然无法禁用闪屏淡出动画。