iOS开发点击UIButton实现UIView的旋转

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 

-(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;
    
}

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首先button的点击方法实现

-(void)testViewDemo
{
    number++;
    if (number%3 == 0) {
        CGAffineTransform at = CGAffineTransformMakeRotation(M_PI/2);
        at = CGAffineTransformTranslate(at, 200, 0);
        [viewDemo setTransform:at];
    }else if (number%3 ==1 ){
        CGAffineTransform at = CGAffineTransformMakeRotation(M_PI/1);
        at = CGAffineTransformTranslate(at, 0, 0);
        [viewDemo setTransform:at];
    }else if(number%3 ==2){
        CGAffineTransform at = CGAffineTransformMakeRotation(M_PI*2);
        at = CGAffineTransformTranslate(at, 0, 0);
        [viewDemo setTransform:at];
    }
}

-(void)testViewDemo
{
    //旋转,左旋
    number++;
    CGAffineTransform rotate = CGAffineTransformMakeRotation(number / 180.0 * M_PI );
    [viewDemo setTransform:rotate];
}

如果使用此方法连续点击button就可以显示处一点一点的移动效果

每次旋转90度的话可以使用一下的代码实现效果

-(void)testViewDemo
{

//旋转,右旋
    number = number+90.0;
    CGAffineTransform rotate = CGAffineTransformMakeRotation(number / 180.0 * M_PI );
    [viewDemo setTransform:rotate];
｝

 UIView实现左旋效果

//旋转,左旋
    number = number-90.0;
    CGAffineTransform rotate = CGAffineTransformMakeRotation(number / 180.0 * M_PI );
    [viewDemo setTransform:rotate];

 

更多阅读请访问http://www.hopean.com

http://www.hopean.com