Iphone 在背景中放置两个uiimageView

这是我的密码：

-(void)transition{
CATransition *applicationLoadViewIn = [CATransition animation];
[applicationLoadViewIn setDuration:2];
[applicationLoadViewIn setType:kCATransitionFade];
[applicationLoadViewIn setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];
[[self.view layer] addAnimation:applicationLoadViewIn forKey:kCATransitionFade];
    imgView2 =   [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bluefont.png"]];          


if(self.view.layer.sublayers.count<=2)

{
    [[[self view] layer] addSublayer:[imgView2 layer]];
}
else {

    [[self.view.layer.sublayers lastObject] removeFromSuperlayer];
}

[imgView2 release];
}


- (void)viewDidLoad {
[super viewDidLoad];
        imgView =   [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"pinkfont.png"]];           
[[[self view] layer] addSublayer:[imgView layer]];
    [imgView release];
[NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(transition) userInfo:nil repeats:YES];

-（无效）转换{
CATTransition*applicationLoadViewIn=[CATTransition动画]；
[applicationLoadViewIn-setDuration:2]；
[applicationLoadViewIn设置类型：kCATransitionFade]；
[applicationLoadViewIn setTimingFunction:[CAMediaTimingFunction，名称：KCAMediaTimingFunctionAsein]；
[[self.view layer]addAnimation:applicationLoadViewIn-forKey:kCATransitionFade]；
imgView2=[[UIImageView alloc]initWithImage:[UIImageName:@“bluefont.png”]；
如果（self.view.layer.sublayers.count）使用帧，您可以将两个图像视图添加到背景中，这可能会很有用

self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"image.png"]];

通过更改背景图像名称，您可以实现。
image1.frame=cgrectmake（0,0320160）；image2.frame=cgrectmake（0160320160）；不，您不明白“imgView 2”占据了整个屏幕，我希望它淡入另一个图像，即“imgView”我试图在背景中设置一个图像，然后将其更改为另一个图像