旋转按钮特效

#import "ViewController.h"
// 设置颜色

define my_color(r,g,b,a) [UIColor colorWithRed:r / 255.0 green:g / 255.0 blue:b / 255.0 alpha:a]**
// 屏幕的尺寸

define my_size [[UIScreen mainScreen] bounds].size

// 按钮的半径
define my_radius 0.33 * my_size.width
// 设置按钮的旋转速度   值越大旋转的越快
define my_speed 0.25**

@interface ViewController ()
// 定时器
@property(nonatomic,strong)NSTimer *timer;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   // 调用加载视图的方法
    [self loadSubview];
    
}

#pragma mark - 加载视图
- (void)loadSubview
{
    
    // 设置背景色
    self.view.backgroundColor = [UIColor colorWithWhite:0.7 alpha:1];
    
    // 设置按钮标题
    NSArray *titleArr = @[@"1",@"2",@"3",@"4",@"5",@"6"];
    // 设置颜色数组
    NSArray *colorArr = @[  my_color(130, 202, 118, 1),
                            my_color(255, 182, 60, 1),
                            my_color(135, 66, 255, 1),
                            my_color(255, 89, 142, 1),
                            my_color(125, 202, 209, 1),
                            my_color(100, 178, 255, 1)];
    
    
    // for循环创建按钮
    for (int i = 0; i < titleArr.count; i++) {
        CGFloat angle = 30+60*i;
        double sinAngle = sin(angle * M_PI / 180);
        double cosAngle = cos(angle *M_PI / 180);
        NSInteger centerX = my_size.width / 2 +cosAngle *my_radius;
        NSInteger centerY = my_size.height / 2 +sinAngle *my_radius;
        UIButton *btn = [[UIButton alloc]init];
        
        btn.tag = 120 + i;
        btn.bounds = CGRectMake(0, 0, 80, 80);
        btn.center = CGPointMake(centerX, centerY);
        
        
        [btn setTitle:titleArr[i] forState:UIControlStateNormal];
        btn.backgroundColor = colorArr[i];
        btn.layer.masksToBounds = YES;
        btn.layer.cornerRadius = 40.0;
        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:btn];
       
    }
     self.timer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(timerGo:) userInfo:nil repeats:YES];

}
#pragma mark -按钮被点击了
- (void)btnClick:(UIButton *)sender
{
    NSLog(@"这里的按钮被点击了");
}
#pragma mark - 定时器方法
- (void)timerGo:(NSTimer *)timer {
    static int count = 0;
    ++count;
    for (int i = 0; i < 6; i++) {
        UIButton * button = (UIButton *)[self.view viewWithTag:120 + i];
        CGFloat angle = 30 + 60 * i + count * my_speed;
        double sinAngle = sin(angle * M_PI / 180);
        double cosAngle = cos(angle * M_PI / 180);
        CGFloat centerX = my_size.width / 2 + cosAngle * my_radius;
        CGFloat centerY = my_size.height / 2 + sinAngle * my_radius;
        button.center = CGPointMake(centerX, centerY);
    }
    if (count == 1000 * 360) {
        count = 0;
    }
}

- (void)dealloc {
    if (_timer) {
        [_timer invalidate];
    }
}


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

@end

...

屏幕快照 2016-08-07 11.04.55.png

...

123.gif