IOS 霓虹灯效果

//初始化视图

- (void) initViews{

//红色视图

UIView *redView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 280, 280)];

redView.backgroundColor=[UIColor redColor];

//视图的标签，标示一个视图对象

redView.tag=1;

[self.view addSubview:redView];

[redView release];

//橙色视图

UIView *oriangeView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 240, 240)];

oriangeView.backgroundColor=[UIColor orangeColor];

oriangeView.tag=2;

[redView addSubview:oriangeView];

[oriangeView release];

//黄色视图

UIView *yellowView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 200)];

yellowView.backgroundColor=[UIColor yellowColor];

yellowView.tag=3;

[oriangeView addSubview:yellowView];

[yellowView release];

//绿色视图

UIView *greenView=[[UIView alloc] initWithFrame:CGRectMake(20,20, 160, 160)];

greenView.backgroundColor=[UIColor greenColor];

greenView.tag=4;

[yellowView addSubview:greenView];

[greenView release];

//青色视图

UIView *cyanView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 120, 120)];

cyanView.backgroundColor=[UIColor cyanColor];

cyanView.tag=5;

[greenView addSubview:cyanView];

[cyanView release];

//蓝色视图

UIView *blueView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 80, 80)];

blueView.backgroundColor=[UIColor blueColor];

blueView.tag=6;

[cyanView addSubview:blueView];

[blueView release];

//紫色视图

UIView *purpleView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 40, 40)];

purpleView.backgroundColor=[UIColor purpleColor];

purpleView.tag=7;

[blueView addSubview:purpleView];

[purpleView release];

}

//实现翻页效果

- (void)xuanzhuang:(id) sender{

//获取当前画图的设备上下文

CGContextRef context=UIGraphicsGetCurrentContext();

//开始准备动画

[UIView beginAnimations:@"*******" context:context];

[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

//设置动画持续时间

[UIView setAnimationDuration:0.5];

//因为没有给该Controller添加实例变量，所以用以下方法获得View

UIView *parentView=[self.view viewWithTag:1];

//设置动画效果

[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:parentView cache:YES]; //从上到下

[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:parentView cache:YES]; //从下往上

// [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:parentView cache:YES]; //从左到右

// [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:parentView cache:YES]; //从右到左

//设置动画委托

[UIView setAnimationDelegate:self];

//当动画啊结束时 调用animationFinished方法

[UIView setAnimationDidStopSelector:@selector(animationFinished:)];

//提交动画

[ UIView commitAnimations];

}

//处理颜色的改变

- (void) showChangeView:(id) sender{

[self xuanzhuang:nil];

NSLog(@"调用showChange函数！！");

//每次调用，当前颜色加1

currentColor++;

if (currentColor>6) {

currentColor=0;

}

colorArray=[NSArray arrayWithObjects:[UIColor redColor],[UIColor orangeColor],[UIColor yellowColor],[UIColor greenColor],[UIColor cyanColor],[UIColor blueColor],[UIColor purpleColor], nil];

//初始化视图数组

for (int i=1; i<=7; i++) {

//存的是7个视图的对象

[viewArray addObject:[self.view viewWithTag:i]];

}

// NSLog(@"颜色数组大小为：%d",[ colorArray count]);

// NSLog(@"视图大小为：%d",[viewArray count]);

//关键代码，循环设置背景色

for (int i=0; i<7-currentColor; i++) {

[[viewArray objectAtIndex:i] setBackgroundColor:[colorArray objectAtIndex:i+currentColor]];

}

for (int i=6-currentColor,j=0; i<7;j++,i++) {

[[viewArray objectAtIndex:i] setBackgroundColor:[colorArray objectAtIndex:j]];

}

}

- (void)viewDidLoad

{

[super viewDidLoad];

NSLog(@"调用viewDidLoad方法！！！");

self.view=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460 )];

self.view.backgroundColor=[UIColor clearColor];

//初始化视图

[self initViews];

//定义一个定时器每隔0.5秒循环调用showChangeView:方法，这个定时器的用法如果还不是很熟悉的话，可以看我的 其他文章，有对他的详细讲解

NSTimer *timer=[NSTimer timerWithTimeInterval:0.5 target:self selector:@selector(showChangeView:) userInfo:nil repeats:YES];

NSRunLoop *runloop=[NSRunLoop currentRunLoop];

[runloop addTimer:timer forMode:NSDefaultRunLoopMode];

}