UIVIew之霓虹燈實現，uiview霓虹燈

UIVIew之霓虹燈實現，uiview霓虹燈

////  AppDelegate.m//  NiHongPractice//#import "AppDelegate.h"#define kColorValue arc4random_uniform(256) / 255.0#define kScreenWidth [UIScreen mainScreen].bounds.size.width#define kScreenHeight [UIScreen mainScreen].bounds.size.height@interface AppDelegate ()@end@implementation AppDelegate- (void)dealloc{    self.window = nil;        [super dealloc];    }- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    // Override point for customization after application launch.    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];            for (int i  = 0; i < 11; i++) {                UIView *view = [[UIView alloc] initWithFrame:CGRectMake(15*i, 15*i, kScreenWidth - 30 * i, kScreenHeight - 30 * i)];                // 色值的範圍(0~255)        view.backgroundColor = [UIColor colorWithRed:kColorValue green:kColorValue blue:kColorValue alpha:1];                view.tag = 200 + i;                [self.window addSubview:view];                [view release];            }    [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(changeColor) userInfo:nil repeats:YES]; // 每過一秒去調用changeColor方法,進行一次色彩轉換        //[self changeColor];        return YES;}- (void)changeColor {        UIColor *color = [self.window viewWithTag:200 + 10].backgroundColor;        for (int i = 10; i >= 0; i--) {                [self.window viewWithTag:200 + i].backgroundColor = [self.window viewWithTag:200 + i - 1].backgroundColor; // 先建立的tag值小,結果顯示為由外向裡轉換顏色            }        [self.window viewWithTag:200].backgroundColor = color;    }