原理是作为在程序启动的代码里面生成一个UIImageView, 此view的图片就是程序中的Default.png图片。
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
[self showSplashView];
}
- (void)showSplashView {
splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 20, 320, 460)];
UIImage *image = [[UIImage alloc] initWithContentsOfFile:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Default.png"]];
splashView.image = image;
[image release];
[window addSubview:splashView];
[window bringSubviewToFront:splashView];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:window cache:YES];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(startupAnimationDone:finished:context:)];
splashView.alpha = 0.0;
splashView.frame = CGRectMake(-60, -40, 440, 600);
[UIView commitAnimations];
}
- (void)startupAnimationDone:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
[splashView removeFromSuperview];
[splashView release];
}
调用的时候:
[self showSplashView];