UI基础-基础控件-0324-transform应用-使用transform实现btn小案例

来源：互联网发布：淘宝秒杀抢拍器怎么买编辑：程序博客网时间：2024/06/07 04:18

利用transform属性可以修改控件的位移（位置）、缩放、旋转创建一个transform属性CGAffineTransform CGAffineTransformMakeTranslation(CGFloat tx,  CGFloat ty) ;CGAffineTransform CGAffineTransformMakeScale(CGFloat sx, CGFloat sy);CGAffineTransform CGAffineTransformMakeRotation(CGFloat angle)(angle是弧度制，并不是角度制)在某个transform的基础上进行叠加CGAffineTransform CGAffineTransformTranslate(CGAffineTransform t, CGFloat tx, CGFloat ty);//平移CGAffineTransform CGAffineTransformScale(CGAffineTransform t, CGFloat sx, CGFloat sy);//比例变化CGAffineTransform CGAffineTransformRotate(CGAffineTransform t, CGFloat angle);//旋转清空之前设置的transform属性view.transform = CGAffineTransformIdentity;

--------------------------------------------------------------------------------------------------

</pre><pre name="code" class="objc">#import "MJViewController.h"@interface MJViewController ()- (IBAction)leftRotate;- (IBAction)up;- (IBAction)big;@end@implementation MJViewController- (IBAction)leftRotate {

*******************************************************************    // 1.取得头像按钮。。一种拖属性，第二种通过tag（只要在view中就可以，如果tag重复，优先原则）    UIButton *head = (UIButton *)[self.view viewWithTag:10]; ********************************************************************       // 2.向左旋转45°    // 45  180    // 角度是正数:顺时针, 角度是负数:逆时针//    head.transform = CGAffineTransformMakeRotation(-M_PI_4);    head.transform = CGAffineTransformRotate(head.transform, M_PI_4);}- (IBAction)up {    // 1.取得头像按钮    UIButton *head = (UIButton *)[self.view viewWithTag:10];        // 2.每次向上移动100的距离//    head.transform = CGAffineTransformMakeTranslation(0, -100);    head.transform = CGAffineTransformTranslate(head.transform, 0, -100);}- (IBAction)big {    // 1.取得头像按钮    UIButton *head = (UIButton *)[self.view viewWithTag:10];        // 2.增大//    head.transform = CGAffineTransformMakeScale(1.5, 1.5);    head.transform = CGAffineTransformScale(head.transform, 1.5, 1.5);}@end

0 0