iOS 霓虹灯效果(同种颜色依次向外扩展)

#import "ZXHAppDelegate.h"

<span style="font-size:18px;">@implementation ZXHAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.

/*
NSArray *arr = [NSArray arrayWithObjects:[UIColor redColor],[UIColor orangeColor],
[UIColor yellowColor],
[UIColor greenColor],[UIColor cyanColor],[UIColor blueColor],
[UIColor purpleColor], nil];
for (NSInteger i = 0; i < 7; i ++) {
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0 + i * 20, 0 + i *20,
 320 - 40 * i , 568 - i * 40)];
view.backgroundColor = arr[random()%6];

[self.window addSubview:view];
[view release];
}
*/

//红色视图
UIView *redView=[[UIView alloc] initWithFrame:CGRectMake(0, 153, 320, 320)];
redView.backgroundColor=[UIColor redColor];
redView.tag = 101;
[self.window addSubview:redView];
[redView release];

//橙色视图
UIView *oriangeView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 280, 280)];
oriangeView.backgroundColor=[UIColor orangeColor];
oriangeView.tag = 102;
[redView addSubview:oriangeView];
[oriangeView release];

//黄色视图
UIView *yellowView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 240, 240)];
yellowView.backgroundColor=[UIColor yellowColor];
yellowView.tag = 103;
[oriangeView addSubview:yellowView];
[yellowView release];

//绿色视图
UIView *greenView=[[UIView alloc] initWithFrame:CGRectMake(20,20, 200, 200)];
greenView.backgroundColor=[UIColor greenColor];
greenView.tag = 104;
[yellowView addSubview:greenView];
[greenView release];

//青色视图
UIView *cyanView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 160, 160)];
cyanView.backgroundColor=[UIColor cyanColor];
cyanView.tag = 105;
[greenView addSubview:cyanView];
[cyanView release];

//蓝色视图
UIView *blueView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 120, 120)];
blueView.backgroundColor=[UIColor blueColor];
blueView.tag = 106;
[cyanView addSubview:blueView];
[blueView release];

//紫色视图

UIView *purpleView=[[UIView alloc] initWithFrame:CGRectMake(20, 20, 80, 80)];
purpleView.backgroundColor=[UIColor purpleColor];
purpleView.tag = 107;
[blueView addSubview:purpleView];
[purpleView release];

[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(Ltime)
userInfo:nil repeats:YES];

self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}

- (void)Ltime
{
UIColor *temp = [self.window viewWithTag:101].backgroundColor;
for (int i = 0; i < 6; i++) {
[self.window viewWithTag:101 + i].backgroundColor =
[self.window viewWithTag:102 + i].backgroundColor;
}
[self.window viewWithTag:107].backgroundColor = temp;
}</span>