走马灯（四个方格循环移动）

1. #import "ViewController.h"  
2.   
3. @interface ViewController ()  
4.   
5. @end  
6. static BOOL bool1 = YES;  
7. @implementation ViewController  
8.   
9. - (void)viewDidLoad  
10. {  
11.     [super viewDidLoad];  
12.       
13.     view1 = [[UIView alloc]init];  
14.     view1.frame = CGRectMake(0, 0, 320, 480);  
15.     view1.backgroundColor =[UIColor greenColor];  
16.     [self.view addSubview:view1];  
17.       
18.     label1 = [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 100, 100)];  
19. //    label1.text = @"a";  
20.     label1.backgroundColor = [UIColor redColor];  
21.     [view1 addSubview:label1];  
22.       
23.     label2 = [[UILabel alloc]initWithFrame:CGRectMake(110, 100, 100, 100)];  
24. //    label2.text = @"b";  
25.     label2.backgroundColor = [UIColor blueColor];  
26.     [view1 addSubview:label2];  
27.       
28.     label3 = [[UILabel alloc]initWithFrame:CGRectMake(10, 200, 100, 100)];  
29. //    label3.text = @"c";  
30.     label3.backgroundColor = [UIColor purpleColor];  
31.     [view1 addSubview:label3];  
32.   
33.     label4 = [[UILabel alloc]initWithFrame:CGRectMake(110, 200, 100, 100)];  
34. //    label4.text = @"d";  
35.     label4.backgroundColor = [UIColor yellowColor];  
36.     [view1 addSubview:label4];  
37.       
38.     button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
39.     button1.frame = CGRectMake(10, 320, 80, 30);  
40.     [button1 setTitle:@"顺时针" forState:UIControlStateNormal];  
41.     [button1 addTarget:self action:@selector(change) forControlEvents:UIControlEventTouchUpInside];  
42.     [view1 addSubview:button1];  
43.       
44.     button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
45.     button2.frame = CGRectMake(130, 320, 80, 30);  
46.     [button2 setTitle:@"逆时针" forState:UIControlStateNormal];  
47.     [button2 addTarget:self action:@selector(changele) forControlEvents:UIControlEventTouchUpInside];  
48.     [view1 addSubview:button2];  
49.       
50.     // Do any additional setup after loading the view, typically from a nib.  
51. }  
52. //顺时针  
53. -(void)change  
54. {  
55.     if (bool1 == YES) {  
56.         [UIView beginAnimations:@"testA" context:NULL];//开始动画  
57.         [UIView setAnimationDuration:1];//动画持续时间  
58.         [UIView setAnimationCurve:UIViewAnimationCurveLinear];  
59.         [UIView setAnimationDelegate:self];//动画代表  
60. //        [UIView setAnimationRepeatAutoreverses:YES];//设置动画重复自动反转  
61.         [UIView setAnimationRepeatCount:99];//循环次数  
62.         a = [[UIView alloc]init];  
63.         a.center = label1.center;  
64.         label1.center = label2.center;  
65.         label2.center = label4.center;  
66.         label4.center = label3.center;  
67.         label3.center = a.center;  
68.         [UIView commitAnimations];  
69.         [button1 setTitle:@"返回" forState:UIControlStateNormal];  
70.         [a release];  
71.         bool1 = NO;  
72.     }  
73.     else {  
74.         [UIView beginAnimations:@"testA" context:NULL];  
75.         [UIView setAnimationDuration:1];  
76.         [UIView setAnimationCurve:UIViewAnimationCurveLinear];  
77.         [UIView setAnimationDelegate:self];  
78.         [UIView setAnimationRepeatAutoreverses:NO];  
79.         [UIView setAnimationRepeatCount:0];  
80.         a = [[UIView alloc]init];  
81.         a.center = label1.center;  
82.         label1.center = label2.center;  
83.         label2.center = label4.center;  
84.         label4.center = label3.center;  
85.         label3.center = a.center;  
86.         [UIView commitAnimations];  
87.         [button1 setTitle:@"顺时针" forState:UIControlStateNormal];  
88.         [a release];  
89.         bool1 = YES;  
90.     }  
91. }  
92.   
93. //逆时针  
94. -(void)changele  
95. {  
96.     if (bool1 == YES) {  
97.         [UIView beginAnimations:@"testA" context:NULL];  
98.         [UIView setAnimationDuration:1];  
99.         [UIView setAnimationCurve:UIViewAnimationCurveLinear];  
100.         [UIView setAnimationDelegate:self];  
101.         [UIView setAnimationRepeatAutoreverses:NO];  
102.         [UIView setAnimationRepeatCount:99];  
103.         a = [[UIView alloc]init];  
104.         a.center = label3.center;  
105.         label3.center = label4.center;  
106.         label4.center = label2.center;  
107.         label2.center = label1.center;  
108.         label1.center = a.center;  
109.         [UIView commitAnimations];  
110.         [button2 setTitle:@"返回" forState:UIControlStateNormal];  
111.         [a release];  
112.         bool1 = NO;  
113.     }  
114.     else {  
115.         [UIView beginAnimations:@"testA" context:NULL];  
116.         [UIView setAnimationDuration:1];  
117.         [UIView setAnimationCurve:UIViewAnimationCurveLinear];  
118.         [UIView setAnimationDelegate:self];  
119.         [UIView setAnimationRepeatAutoreverses:NO];  
120.         [UIView setAnimationRepeatCount:0];  
121.         a = [[UIView alloc]init];  
122.         a.center = label3.center;  
123.         label3.center = label4.center;  
124.         label4.center = label2.center;  
125.         label2.center = label1.center;  
126.         label1.center = a.center;  
127.         [UIView commitAnimations];  
128.         [button2 setTitle:@"逆时针" forState:UIControlStateNormal];  
129.         [a release];  
130.         bool1 = YES;  
131.     }  
132.   
133. }  
134. -(void)dealloc  
135. {  
136.     [view1 release];  
137.     [label1 release];  
138.     [label2 release];  
139.     [label3 release];  
140.     [label4 release];  
141.     [super dealloc];  
142. }  
143.   
144.   
145.   
146. - (void)viewDidUnload  
147. {  
148.     [super viewDidUnload];  
149.     // Release any retained subviews of the main view.  
150. }  
151.   
152. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  
153. {  
154.     return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);  
155. }  
156.   
157. @end