054点击按钮后实现阴影反转

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController
4 @end

ViewController.m

 1 #import "ViewController.h"
 2
 3 @interface ViewController ()
 4 @end
 5
 6 @implementation ViewController
 7
 8 - (void)viewDidLoad {
 9     [super viewDidLoad];
10
11     UIButton *btnShadow = [UIButton buttonWithType:UIButtonTypeCustom];
12     btnShadow.frame = CGRectMake(0, 0, 220, 60);
13     btnShadow.center = self.view.center;
14     btnShadow.backgroundColor = [UIColor colorWithRed:0.513 green:0.894 blue:1.000 alpha:1.000];
15     btnShadow.layer.masksToBounds = YES;
16     btnShadow.layer.cornerRadius = 10.0;
17     btnShadow.layer.borderColor = [UIColor colorWithRed:1.000 green:0.572 blue:0.894 alpha:1.000].CGColor;
18     btnShadow.layer.borderWidth = 2.0;
19     //设置按钮标题字体及阴影颜色
20     btnShadow.titleLabel.font = [UIFont boldSystemFontOfSize:20];
21     btnShadow.titleLabel.shadowOffset = CGSizeMake(2.0, 2.0);
22     //设置普通状态下的显示特征
23     [btnShadow setTitle:@"点我自动进行阴影反转" forState:UIControlStateNormal];
24     [btnShadow setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
25     [btnShadow setTitleShadowColor:[UIColor grayColor] forState:UIControlStateNormal];
26
27     //点击在普通状态和高亮状态进行阴影反转
28     btnShadow.reversesTitleShadowWhenHighlighted = YES; //默认值是NO
29
30     [self.view addSubview:btnShadow];
31 }
32
33 - (void)didReceiveMemoryWarning {
34     [super didReceiveMemoryWarning];
35     // Dispose of any resources that can be recreated.
36 }
37
38 @end