为iOS App增加启动渐变效果

最新推荐文章于 2021-01-26 17:48:14 发布

原创最新推荐文章于 2021-01-26 17:48:14 发布 · 3.6k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#ios #application #uiview

iOS 专栏收录该内容

91 篇文章

订阅专栏

本文介绍如何在iOS应用启动后实现一个自定义的过渡效果，通过在AppDelegate中添加一个启动画面，并使用UIView动画和CATransform3D进行缩放和透明度调整，使应用启动过程更加流畅美观。

由于目前苹果没有支持该功能，所以只能自己在App启动后做一个过度效果：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    
    UIImageView *splashScreen = [[[UIImageView alloc] initWithFrame:self.window.bounds] autorelease];
    splashScreen.image = [UIImage imageNamed:@"Default"];
    [self.window addSubview:splashScreen];
    
    [UIView animateWithDuration:1.0 animations:^{
        CATransform3D transform = CATransform3DMakeScale(1.5, 1.5, 1.0);
        splashScreen.layer.transform = transform;
        splashScreen.alpha = 0.0;
    } completion:^(BOOL finished) {
        [splashScreen removeFromSuperview];
    }];
    
    return YES;
}