transform 学习

- (void)viewDidLoad {

    

    

    [super viewDidLoad];

    

    

    UILabel *backLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 100, 100)];

    backLabel.backgroundColor = [UIColor blueColor];

    backLabel.textColor = [UIColor whiteColor];

    backLabel.text = @"原效果图";

    [self.view addSubview:backLabel];

    

    

    [self CGAffineTransformMakeScaleTest];

    

    [self CGAffineTransformMakeRotationTest];

    

    [self CGAffineTransformMakeTranslationTest];

    

    [self CGAffineTransformMakeTestOne];

    

    [self CGAffineTransformMakeTestTwo];

    

    

    

}

 

 

/**

缩放: CGAffineTransformMakeScale(<#CGFloat sx#>, <#CGFloat sy#>)

    会按照中心点     位置     进行缩放操作

 

    CGPoint centerpoint = CGPointMake(backView.frame.origin.x + backView.frame.size.width, backView.frame.origin.y+backView.frame.size.height);

 

 

*/

- (void)CGAffineTransformMakeScaleTest

{

    

    UILabel *backView = [[UILabel alloc] initWithFrame:CGRectMake(150, 80, 100, 100)];

    backView.backgroundColor = [UIColor redColor];

    backView.text = @"进行缩放操作";

    backView.textColor = [UIColor whiteColor];

    [self.view addSubview:backView];

    

    backView.transform = CGAffineTransformMakeScale(0.1, 0.1);

 

    [UIView animateWithDuration:5.0f animations:^{

 

        backView.transform = CGAffineTransformMakeScale(1.0, 1.0f);

 

    } completion:^(BOOL finished) {

 

        backView.transform = CGAffineTransformIdentity;

 

    }];

    

    

    

}

 

/**

旋转: CGAffineTransformMakeRotation(<#CGFloat angle#>)

会按照中心点     位置     进行旋转操作

 

M_PI  =180;

 

CGPoint centerpoint = CGPointMake(backView.frame.origin.x + backView.frame.size.width, backView.frame.origin.y+backView.frame.size.height);

 

 

*/

 

 

- (void)CGAffineTransformMakeRotationTest

{

    UILabel *backView = [[UILabel alloc] initWithFrame:CGRectMake(50, 200, 100, 100)];

    backView.backgroundColor = [UIColor grayColor];

    backView.text = @"进行旋转";

    backView.textColor = [UIColor whiteColor];

    [self.view addSubview:backView];

    

    backView.transform = CGAffineTransformMakeRotation(0);

    

    [UIView animateWithDuration:5.0f animations:^{

        

        backView.transform = CGAffineTransformMakeRotation(M_PI/4);

        

    } completion:^(BOOL finished) {

        

        

    }];

    

    

}

 

 

 

/**

平移操作

                                  现对于控件frame 进行左边 偏移x距离

CGAffineTransformMakeTranslation(<#CGFloat tx#>, <#CGFloat ty#>)

                                     现对于控件frame 进行下边 偏移y距离

*/

- (void)CGAffineTransformMakeTranslationTest

{

    UILabel *backView = [[UILabel alloc] initWithFrame:CGRectMake(180, 250, 100, 100)];

    backView.backgroundColor = [UIColor cyanColor];

    backView.text = @"进行平移";

    backView.textColor = [UIColor whiteColor];

    [self.view addSubview:backView];

    

    

    [UIView animateWithDuration:5.0f animations:^{

        

        backView.transform = CGAffineTransformMakeTranslation(50, 0);

 

        

    } completion:^(BOOL finished) {

        

        [UIView animateWithDuration:5.0f animations:^{

            

            backView.transform = CGAffineTransformMakeTranslation(50, 50);

            

            

        } completion:^(BOOL finished) {

            

            

        }];

 

        

    }];

}

 

 

/**

进行一系列动作。包括 缩放 旋转 平移

 

CGAffineTransformMake(a, b, c, d,tx, ty);

 

ad    缩放

bc    旋转

xy    平移

 

tx     用来控制在x轴方向上的平移

ty     用来控制在y轴方向上的平移

a      用来控制在x轴方向上的缩放

d      用来控制在y轴方向上的缩放

 

abcd 共同控制旋转

 

 

*/

- (void)CGAffineTransformMakeTestOne

{

    

    

    UILabel *backView = [[UILabel alloc] initWithFrame:CGRectMake(0, 400, 100, 100)];

    backView.backgroundColor = [UIColor orangeColor];

    backView.text = @"进行动画组合(缩放 + 平移)";

    backView.textColor = [UIColor whiteColor];

    backView.numberOfLines = 0;

    backView.font = [UIFont systemFontOfSize:10];

    [self.view addSubview:backView];

    

    

    CGFloat offsetX = backView.frame.size.width/2;

    CGFloat offsetY = -backView.frame.size.height/2;//中心点位置开始centerpoint

 

 

    [UIView animateWithDuration:5.0f animations:^{

 

        backView.transform = CGAffineTransformMake(0.01, 0, 0, 0.01, offsetX, offsetY);

        

 

    } completion:^(BOOL finished) {

 

        backView.transform = CGAffineTransformMake(1, 0, 0, 1, 0, 0);

 

 

    }];

}

 

 

- (void)CGAffineTransformMakeTestTwo

{

    

    

    UILabel *backView = [[UILabel alloc] initWithFrame:CGRectMake(200, 450, 100, 100)];

    backView.backgroundColor = [UIColor greenColor];

    backView.text = @"进行动画组合(旋转 +平移)";

    backView.textColor = [UIColor whiteColor];

    backView.numberOfLines = 0;

    backView.font = [UIFont systemFontOfSize:10];

    [self.view addSubview:backView];

    

    

    CGFloat offsetX = backView.frame.size.width/2;

    CGFloat offsetY = -backView.frame.size.height/2;//中心点位置开始centerpoint

    

    

    [UIView animateWithDuration:5.0f animations:^{

        

        backView.transform = CGAffineTransformMake(0, 0.1, 0.1, 0, offsetX, offsetY);

        

        

    } completion:^(BOOL finished) {

        

        backView.transform = CGAffineTransformMake(0, 1, 1, 0, 0, 0);

        

        

    }];

}