IOS 作业项目(3) 霓虹灯效果

先上效果图

#import "CHViewController.h"
@interface CHViewController ()
{
    int i;
    int j;
}
@property NSInteger isStart;
@property (nonatomic,retain) NSMutableArray *viewArray;
@property (nonatomic,retain) UIView *neonView;
@property (nonatomic,retain)   NSTimer *timer;

@end

static inline CGRect rectWithScale(CGRect rect,CGFloat scale)
{
    rect.size.width+=scale;
    rect.size.height+=scale;
    return rect;
}

@implementation CHViewController
-(UIColor *)getRandomColor:(NSInteger)max add:(NSInteger)num
{
    CGFloat r,g,b;
    r=arc4random()%max +num;
    g=arc4random()%max +num;
    b=arc4random()%max +num;
    return [UIColor colorWithRed:r/225.0 green:g/225.0 blue:b/225.0 alpha:1.0f];
}

- (void)viewDidLoad
{
    i=0;//视图下标
    j=0;
        _isStart=0;
    ///////////背景色
    UIView *backGround=[[UIView alloc]initWithFrame:self.view.bounds];
    backGround.backgroundColor= [self getRandomColor:31 add:95];
    [self.view addSubview:backGround];
    //////////标题栏视图设置
    UIView *titleView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 20)];
    titleView.backgroundColor=[UIColor colorWithRed:33/255.0 green:33/255.0  blue:33/255.0  alpha:0.5];
    [backGround addSubview:titleView];
    //////////按钮设置
   UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame=CGRectMake(20, backGround.bounds.size.height-130, 280, 40);
    [button setTitle:@"Start" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    button.backgroundColor=[UIColor whiteColor];
    [backGround addSubview:button];
    [button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
    
    ///////////////霓虹灯框视图设置
    _neonView=[[UIView alloc]initWithFrame:CGRectMake(50, 60, 220, 220)];
    _neonView.backgroundColor=[UIColor whiteColor];
    [backGround addSubview:_neonView];
 
    //////////////zoom视图入数组
    _viewArray=[[NSMutableArray alloc]init];
    for (int index=0; index<1000; index++) {
        UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0,0,5,5)];
          CGPoint point=CGPointMake(CGRectGetMidX(_neonView.bounds), CGRectGetMidY(_neonView.bounds));
        view.center=point;
            view.bounds=rectWithScale(view.bounds, 4.3f);
            view.backgroundColor=[self getRandomColor:256 add:0];
        [_viewArray addObject:view];
    }
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)onClick:(UIButton *)button
{
    i=0;

    if (_isStart==0) {
_timer=[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(showTime:) userInfo:nil repeats:YES];
        _isStart=1;
        [button setTitle:@"Stop" forState:UIControlStateNormal];
        
    }
    else
    {
        _isStart=0;
        [button setTitle:@"Start" forState:UIControlStateNormal];
        [_timer invalidate];
    }
    }

-(void)showTime:(NSTimer *)timer
{
 
   for (j=0; j<i; j++) {
     if (((UIView*)_viewArray[j]).bounds.size.height>=CGRectGetHeight(_neonView.bounds)) {
        ((UIView*)_viewArray[j]).bounds=CGRectMake(0,0,5,5);
        ((UIView*)_viewArray[j]).center=CGPointMake(CGRectGetMidX(_neonView.bounds), CGRectGetMidY(_neonView.bounds));
        [((UIView*)_viewArray[j]) removeFromSuperview];
         //[_neonView addSubview:_viewArray[j]];
        
    }
        ((UIView*)_viewArray[j]).bounds=rectWithScale(((UIView*)_viewArray[j]).bounds, 5.0f);
       // ((UIView*)_viewArray[j]).backgroundColor=[self getRandomColor:256 add:0];
        if (i<1000)
       [_neonView addSubview:_viewArray[j]];
      
   }
    if (i<1000) {
         i++;
    }
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
  /*  UIView *view=    }*/

}

@end