旋转触摸视图-移动开发问题

rotating a view on touch(旋转触摸视图)

本文介绍了旋转触摸视图的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我必须在手指触摸时循环旋转视图......我的意思是像拨打旧电话号码......并且触摸应该只在角落......任何人都可以帮助我......我有尝试了很多...但没有成功

I have to rotate a view circularly on finger touch...I mean like dialing the old phones number...and the touch should be only on corners.....can any one help me...i have tried it a lot...but was not successes

推荐答案

您需要在要旋转的视图上定义 UIRotationGestureRecognize，然后添加选择器方法并像这样实现它.

You need to define the UIRotationGestureRecognize on the view that you want to rotate and than add a selector method and implement it like this.

给你添加这个viewDidLoad方法

UIRotationGestureRecognizer *rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];

[myUIViewObject addGestureRecognizer:rotate];

[rotate release];

然后实现方法.

- (void) rotation:(UIRotationGestureRecognize *) sender
{
    CGAffineTransform myTransform = CGAffineTransformMakeRotation(sender.rotation);
    sender.view.transform = myTransform;
}

PS.myUIViewObject 可以是您想要旋转的任何 UIView 对象.

PS. myUIViewObject can be any UIView Object that you want to rotate.

你会在这里找到很多关于这方面的信息:

you will find a lot of information on this here:

http://www.iphonedevsdk.com/forum/iphone-sdk-development/49847-how-find-angle-two-points.html

这篇关于旋转触摸视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！