IOS实现点击滑动抽屉效果

时间:2022-12-07 22:49:37

最近,看到好多Android上的抽屉效果,也忍不住想要自己写一个。在Android里面可以用SlidingDrawer,很方便的实现。IOS上面就只有自己写了。其实原理很简单就是 UIView 的移动,和一些手势的操作。

效果图:

IOS实现点击滑动抽屉效果

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//
// DrawerView.h
// DrawerDemo
//
// Created by Zhouhaifeng on 12-3-27.
// Copyright (c) 2012年 CJLU. All rights reserved.
//
 
#import <UIKit/UIKit.h>
 
typedef enum
{
 DrawerViewStateUp = 0,
 DrawerViewStateDown
}DrawerViewState;
 
@interface DrawerView : UIView<UIGestureRecognizerDelegate>
{
 UIImageView *arrow;   //向上拖拽时显示的图片 
 
 CGPoint upPoint;   //抽屉拉出时的中心点
 CGPoint downPoint;   //抽屉收缩时的中心点
  
 UIView *parentView;   //抽屉所在的view
 UIView *contentView;  //抽屉里面显示的内容
  
 DrawerViewState drawState; //当前抽屉状态
}
 
- (id)initWithView:(UIView *) contentview parentView :(UIView *) parentview;
- (void)handlePan:(UIPanGestureRecognizer *)recognizer;
- (void)handleTap:(UITapGestureRecognizer *)recognizer;
- (void)transformArrow:(DrawerViewState) state;
 
@property (nonatomic,retain) UIView *parentView;
@property (nonatomic,retain) UIView *contentView;
@property (nonatomic,retain) UIImageView *arrow;
@property (nonatomic) DrawerViewState drawState;
 
@end
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//
// DrawerView.m
// DrawerDemo
//
// Created by Zhouhaifeng on 12-3-27.
// Copyright (c) 2012年 CJLU. All rights reserved.
//
 
#import "DrawerView.h"
 
@implementation DrawerView
@synthesize contentView,parentView,drawState;
@synthesize arrow;
 
- (id)initWithView:(UIView *) contentview parentView :(UIView *) parentview;
{
 self = [super initWithFrame:CGRectMake(0,0,contentview.frame.size.width, contentview.frame.size.height+40)];
 if (self) {
  // Initialization code  
  contentView = contentview;
  parentView = parentview;
   
  //一定要开启
  [parentView setUserInteractionEnabled:YES];
   
  //嵌入内容区域的背景
  UIImage *drawer_bg = [UIImage imageNamed:@"drawer_content.png"];
  UIImageView *view_bg = [[UIImageView alloc]initWithImage:drawer_bg];
  [view_bg setFrame:CGRectMake(0,40,contentview.frame.size.width, contentview.bounds.size.height+40)];
  [self addSubview:view_bg];
  
  //头部拉拽的区域背景
  UIImage *drawer_handle = [UIImage imageNamed:@"drawer_handlepng.png"];
  UIImageView *view_handle = [[UIImageView alloc]initWithImage:drawer_handle];
  [view_handle setFrame:CGRectMake(0,0,contentview.frame.size.width,40)];
  [self addSubview:view_handle];
   
  //箭头的图片
  UIImage *drawer_arrow = [UIImage imageNamed:@"drawer_arrow.png"];
  arrow = [[UIImageView alloc]initWithImage:drawer_arrow];
  [arrow setFrame:CGRectMake(0,0,28,28)];
  arrow.center = CGPointMake(contentview.frame.size.width/2, 20);
  [self addSubview:arrow];
   
  //嵌入内容的UIView
  [contentView setFrame:CGRectMake(0,40,contentview.frame.size.width, contentview.bounds.size.height+40)];
  [self addSubview:contentview];
   
  //移动的手势
  UIPanGestureRecognizer *panRcognize=[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
  panRcognize.delegate=self;
  [panRcognize setEnabled:YES];
  [panRcognize delaysTouchesEnded];
  [panRcognize cancelsTouchesInView];
   
  [self addGestureRecognizer:panRcognize];
   
  //单击的手势
  UITapGestureRecognizer *tapRecognize = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];
  tapRecognize.numberOfTapsRequired = 1;
  tapRecognize.delegate = self;
  [tapRecognize setEnabled :YES];
  [tapRecognize delaysTouchesBegan];
  [tapRecognize cancelsTouchesInView];
   
  [self addGestureRecognizer:tapRecognize];
   
  //设置两个位置的坐标
  downPoint = CGPointMake(parentview.frame.size.width/2, parentview.frame.size.height+contentview.frame.size.height/2-40);
  upPoint = CGPointMake(parentview.frame.size.width/2, parentview.frame.size.height-contentview.frame.size.height/2-40);
  self.center = downPoint;
   
  //设置起始状态
  drawState = DrawerViewStateDown;
 }
 return self;
}
 
 
#pragma UIGestureRecognizer Handles
/* 
 * 移动图片处理的函数
 * @recognizer 移动手势
 */
- (void)handlePan:(UIPanGestureRecognizer *)recognizer {
  
  
 CGPoint translation = [recognizer translationInView:parentView];
 if (self.center.y + translation.y < upPoint.y) {
  self.center = upPoint;
 }else if(self.center.y + translation.y > downPoint.y)
 {
  self.center = downPoint;
 }else{
  self.center = CGPointMake(self.center.x,self.center.y + translation.y);
 }
 [recognizer setTranslation:CGPointMake(0, 0) inView:parentView];
  
 if (recognizer.state == UIGestureRecognizerStateEnded) {
  [UIView animateWithDuration:0.75 delay:0.15 options:UIViewAnimationOptionCurveEaseOut animations:^{
    if (self.center.y < downPoint.y*4/5) {
     self.center = upPoint;
     [self transformArrow:DrawerViewStateUp];
    }else
    {
     self.center = downPoint;
     [self transformArrow:DrawerViewStateDown];
    }
 
  } completion:nil];
 
 
}
 
/*
 * handleTap 触摸函数
 * @recognizer UITapGestureRecognizer 触摸识别器
 */
-(void) handleTap:(UITapGestureRecognizer *)recognizer
{
  [UIView animateWithDuration:0.75 delay:0.15 options:UIViewAnimationOptionTransitionCurlUp animations:^{
   if (drawState == DrawerViewStateDown) {
    self.center = upPoint;
    [self transformArrow:DrawerViewStateUp];
   }else
   {
    self.center = downPoint;
    [self transformArrow:DrawerViewStateDown];
   }
  } completion:nil];
 
}
 
/*
 * transformArrow 改变箭头方向
 * state DrawerViewState 抽屉当前状态
 */
-(void)transformArrow:(DrawerViewState) state
{
  //NSLog(@"DRAWERSTATE :%d STATE:%d",drawState,state);
  [UIView animateWithDuration:0.3 delay:0.35 options:UIViewAnimationOptionCurveEaseOut animations:^{
   if (state == DrawerViewStateUp){ 
     arrow.transform = CGAffineTransformMakeRotation(M_PI);
    }else
    {
      arrow.transform = CGAffineTransformMakeRotation(0);
    }
  } completion:^(BOOL finish){
    drawState = state;
  }];
   
  
}
 
@end

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