iOS开发点击UIButton实现UIView的旋转

hopeanCom

<div id="cnblogs_post_body">iOS开发点击UIButton实现UIView的旋转
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首先创建界面，在viewDidLoad创建view以及button
相关代码如下
<div class="cnblogs_code">-(void)viewDidLoad{    [super viewDidLoad];        viewDemo = [[UIView alloc] initWithFrame:CGRectMake(0, 50, 320, 50)];    [viewDemo setBackgroundColor:[UIColor brownColor]];    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 50)];    label.text =@"Test";    label.tag=100;    [viewDemo addSubview:label];    [self.view addSubview:viewDemo];    [label release];        // Do any additional setup after loading the view, typically from a nib.    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 400, 100, 50)];    [btn setBackgroundColor:[UIColor blueColor]];    btn.showsTouchWhenHighlighted = YES;    [btn setTitle:@"点击旋转" forState:UIControlStateNormal];    [self.view addSubview:btn];    btn.tag = 10010;    [btn addTarget:self action:@selector(testViewDemo) forControlEvents:UIControlEventTouchUpInside];    [btn release];    number = 0;    }