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

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];
  
  

  }
  }