iOS UIPanGestureRecognizer(拖动手势) 和 点击按钮 实现类似左抽屉的效果

<pre name="code" class="objc">//
//  PublicViewController.m
//  slidingTest
//
//  Created by rimi on 15/12/3.
//  Copyright © 2015年 hxm. All rights reserved.
//

#import "PublicViewController.h"
#import "SldingViewController.h"
#define SCREEN_W [UIScreen mainScreen].bounds.size.width
#define SCREEN_H [UIScreen mainScreen].bounds.size.height
#define MIN_CENTER_X SCREEN_W/6
#define MAX_CENTER_X SCREEN_W/6*4
@interface PublicViewController ()
{
UIButton *okBtn;
SldingViewController *sldingView;
}
@end

@implementation PublicViewController

- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor cyanColor];

/**< 初始化按钮  */
okBtn = [UIButton buttonWithType:UIButtonTypeSystem];
okBtn.frame = CGRectMake(SCREEN_W/30, SCREEN_H/1.2, SCREEN_W/10, SCREEN_W/10);
okBtn.backgroundColor = [UIColor whiteColor];
[okBtn setTitle:@"点击" forState:UIControlStateNormal];
[okBtn addTarget:self action:@selector(respondToOkBtn) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:okBtn];

/**< 添加滑动视图  */
sldingView = [[SldingViewController alloc]init];
sldingView.view.backgroundColor = [UIColor orangeColor];
sldingView.view.frame = CGRectMake(SCREEN_W/6, 0, SCREEN_W, SCREEN_H);
[self.view addSubview:sldingView.view];

/**
*  拖动手势方法
*/
[self initializeGestureRecognizer];

}

#pragma mark - respondToOkBtn
- (void)respondToOkBtn
{
//判断，如果滑动视图的中心点 > 最小距离的中心点
if (sldingView.view.center.x > MIN_CENTER_X + CGRectGetWidth(self.view.bounds)/2) {
[UIView animateWithDuration:0.4 animations:^{
/**< 滑动视图的中心点 = 最小距离的中心点 */
sldingView.view.center = CGPointMake(MIN_CENTER_X+CGRectGetWidth(self.view.bounds)/2,sldingView.view.center.y);
}];
}
else
{
/**< 反之则执行 滑动视图的中心点 = 最大距离的中心点  */
[UIView animateWithDuration:0.4 animations:^{
sldingView.view.center = CGPointMake(MAX_CENTER_X+CGRectGetWidth(self.view.bounds)/2, sldingView.view.center.y);
}];
}
}

#pragma mark -添加拖动手势
- (void)initializeGestureRecognizer
{
//创建拖动手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self
action:@selector(respondsToGestureRecognizer:)];
//将手势添加到滑动视图上
[sldingView.view addGestureRecognizer:pan];
}
/**< 响应拖动手势  */
- (void)respondsToGestureRecognizer:(UIPanGestureRecognizer*)getsure
{
//设置移动距离
CGPoint translation = [getsure translationInView:sldingView.view];
//设置拖动中心
CGPoint desCenter;
desCenter.y = sldingView.view.center.y;

//设置x轴的变化位置
CGFloat source_x = sldingView.view.center.x;

//如果移动距离的值 <= 0 时，则向左滑
if (translation.x <= 0) {
//MAX 两者之中取最大值
desCenter.x = MAX(desCenter.x = source_x + translation.x,MIN_CENTER_X + CGRectGetWidth(self.view.bounds)/2);
}
else//向右滑
{
desCenter.x = MIN(desCenter.x = source_x + translation.x, MAX_CENTER_X + CGRectGetWidth(self.view.bounds)/2);
}
//移动的中心点 赋值给 拖动视图的中心点
sldingView.view.center = desCenter;
//拖动视图上的拖动手势设置移动的起始坐标为(0,0)
[getsure setTranslation:CGPointMake(0, 0) inView:sldingView.view];

}
@end

<img src="http://img.blog.csdn.net/20151203130503982?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />