一、效果图
二、代码
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.title = @"背景颜色的随机显示";
}
//点击视图，视图颜色随机更改
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
CGFloat red = (CGFloat)arc4random() / 0x100000000;
CGFloat green = (CGFloat)arc4random() / 0x100000000;
CGFloat blue = (CGFloat)arc4random() / 0x100000000;
//设置三原色
self.view.backgroundColor = [UIColor colorWithRed:red green:green blue:blue alpha:1.0f];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end