1 @interface ViewController ()
2
3
4 @property (weak, nonatomic) IBOutlet UIButton *btn;
5
6
7
8 - (IBAction)reset:(id)sender;
9 - (IBAction)run:(id)sender;
10 - (IBAction)rotate:(id)sender;
11 - (IBAction)scale:(id)sender;
12
13 @end
14
15 @implementation ViewController
16
17 - (void)viewDidLoad {
18 [super viewDidLoad];
19
20
21 }
22
23 //定义函数,参数是block类型 无返回值,无参数的block
24
25 - (void)btnClickWithBlock:(void (^)())block
26 {
27 // 0.动画（头部-开始动画）
28 [UIView beginAnimations:nil context:nil];
29 // 设置动画的执行时间
30 [UIView setAnimationDuration:1.0];
31
32 //block的调用
33 block();
34
35 // 1.动画（尾部-提交动画-执行动画）
36 [UIView commitAnimations];
37 }
38
39
40
41 - (void)didReceiveMemoryWarning {
42 [super didReceiveMemoryWarning];
43 // Dispose of any resources that can be recreated.
44 }
45
46
47 //重置
48 - (IBAction)reset:(id)sender {
49
50 [self btnClickWithBlock:^{
51 _btn.transform = CGAffineTransformIdentity;
52 }];
53 }
54
55
56
57 //行走
58 - (IBAction)run:(id)sender {
59
60 [self btnClickWithBlock:^{
61
62 NSLog(@"self = %@",self); //表示此控制器
63
64 // 1.先取出frame
65 CGPoint tempCenter = _btn.center;
66
67 // 2.取出按钮的tag标记
68 NSInteger tag = [sender tag];
69
70 switch (tag) {
71 case 10:
72
73 tempCenter.y -= kDelta;
74
75 break;
76
77 case 20:
78
79 tempCenter.x -= kDelta;
80 break;
81
82 case 30:
83
84 tempCenter.y += kDelta;
85 break;
86
87
88 case 40:
89
90 tempCenter.x += kDelta;
91 break;
92
93
94 default:
95 break;
96 }
97
98 // 3.重新赋值按钮的frame
99 _btn.center = tempCenter;
100
101
102
103 }];
104 }
105
106 //旋转
107 - (IBAction)rotate:(id)sender {
108
109 [self btnClickWithBlock:^{
110 NSInteger tag = [sender tag];
111 if (10 == tag) { // 左
112 _btn.transform = CGAffineTransformRotate(_btn.transform, M_PI_4 * -1);
113 } else { // 右
114 _btn.transform = CGAffineTransformRotate(_btn.transform, M_PI_4 * 1);
115 }
116 }];
117
118 }
119
120 //缩放
121 - (IBAction)scale:(id)sender {
122
123 [self btnClickWithBlock:^{
124 CGFloat scale = [sender tag] == 20 ? 1.2 : 0.8;
125 _btn.transform = CGAffineTransformScale(_btn.transform, scale, scale);
126 }];
127
128
129 }
