为iOS App增加启动动画效果

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 -(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions
 {
 self.window=[[[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]]autorelease];
 //Overridepointforcustomizationafterapplicationlaunch.
 self.viewController=[[[ViewControlleralloc]initWithNibName:@"ViewController"bundle:nil]autorelease];
 self.window.rootViewController=self.viewController;
 [self.windowmakeKeyAndVisible];

 UIImageView*splashScreen=[[[UIImageViewalloc]initWithFrame:self.window.bounds]autorelease];
 splashScreen.image=[UIImageimageNamed:@"Default"];
 [self.windowaddSubview:splashScreen];
  [NSThread sleepForTimeInterval:10.0];
 [UIViewanimateWithDuration:1.0animations:^{
 CATransform3Dtransform=CATransform3DMakeScale(1.5,1.5,1.0);
 splashScreen.layer.transform=transform;
 splashScreen.alpha=0.0;
 }completion:^(BOOLfinished){
 [splashScreenremoveFromSuperview];
 }];

 returnYES;
 }

 -(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions
 {
 self.window=[[[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]]autorelease];
 //Overridepointforcustomizationafterapplicationlaunch.
 self.viewController=[[[ViewControlleralloc]initWithNibName:@"ViewController"bundle:nil]autorelease];
 self.window.rootViewController=self.viewController;
 [self.windowmakeKeyAndVisible];

 UIImageView*splashScreen=[[[UIImageViewalloc]initWithFrame:self.window.bounds]autorelease];
 splashScreen.image=[UIImageimageNamed:@"Default"];
 [self.windowaddSubview:splashScreen];
  [NSThread sleepForTimeInterval:10.0];
 [UIViewanimateWithDuration:1.0animations:^{
 CATransform3Dtransform=CATransform3DMakeScale(1.5,1.5,1.0);
 splashScreen.layer.transform=transform;
 splashScreen.alpha=0.0;
 }completion:^(BOOLfinished){
 [splashScreenremoveFromSuperview];
 }];

 returnYES;
 }