iOS-UI-View-实现七种颜色的--跑马灯效果-使用for循环铺view forin遍历颜色

iOS-UI-View-实现七种颜色的--跑马灯效果-
使用for循环铺view forin遍历颜色
iOS跑马灯效果
写在ViewController.m

#import "ViewController.h"

@interface ViewController ()
@property (nonatomic, retain) NSArray *colorArr;
@end

@implementation ViewController

  • (void)dealloc
    {
    [_colorArr release];
    [super dealloc];
    }

  • (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    // 颜色数组
    self.colorArr = [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(i * 30, i * 30, 375 - 60 * i, 667 - 60 * i)];
    // 颜色赋值
    view.backgroundColor = [self.colorArr objectAtIndex:i];

      [self.view addSubview:view];
      [view release];
    

    }

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

}

  • (void)timeAction
    {
    for (UIView *view in self.view.subviews) {
    // 获取当前view的颜色在颜色数组中的下标
    NSInteger index = [self.colorArr indexOfObject:view.backgroundColor];
    // 将下一个颜色作为当前视图的颜色
    view.backgroundColor = [self.colorArr objectAtIndex:(index + 1) % 7];
}

}

跑马灯效果代码
跑马灯效果代码

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