iOS界面-仿网易新闻左侧抽屉式交互 续(添加新闻内容页和评论页手势)

转自： http://blog.csdn.net/totogo2010/article/details/8637430

1、介绍

有的博友看了上篇博文 iOS界面-仿网易新闻左侧抽屉式交互 ，在微博里问，网易新闻里的内容和评论的拖拽如何实现，

上面的UINavigation如何嵌进去。可能不少人有这样的需求，现在花了些时间把这两个效果做一下，

和大家分享交流。思路和上篇基本差不多，但是没有用到UINavigation，其实在我看来上面的返回、

评论按钮都是可以通过addsubview添加的。内容页和评论页的手势交互 实现的效果如下：

图中的箭头是手势拖动的方向。

2、跳转添加

网易新闻的按钮都是可点击的，所以在这个例子中除了能通过手势操作。运行例子代码的时候注意下面的内容：

我在代码中添加了一些button，下面图中红色框框里的区域是可点可跳转的：

列表页第一条新闻可点，内容页左上角可点返回，评论页左上角也可点返回。其他部分都是图片。

3、部分代码

仿照customView的代码做了新闻内容的视图 DetailView，代码如下：

--

 #import <UIKit/UIKit.h>

 @class CommentView;

 @interface DetailView : UIView
 {
     CommentView *commentView;
     BOOL isPanComment;
 }
 - (id)initWithView:(UIView*)contentView parentView:(UIView*) parentView;

 @property (nonatomic, strong) UIView *parentView; //抽屉视图的父视图
 @property (nonatomic, strong) UIView *contentView; //抽屉显示内容的视图
 @end

 //
 //  DetailView.m
 //  NeteaseNews
 //
 //  Created by rongfzh on 13-3-5.
 //  Copyright (c) 2013年 rongfzh. All rights reserved.
 //

 #import "DetailView.h"
 #import "CommentView.h"
 #import <QuartzCore/QuartzCore.h>

 @implementation DetailView

 - (id)initWithFrame:(CGRect)frame
 {
     self = [super initWithFrame:frame];
     if (self) {
         // Initialization code
     }
     return self;
 }

 - (id)initWithView:(UIView *)contentView parentView:(UIView *)parentView{

     self = [super initWithFrame:CGRectMake(0,0,contentView.frame.size.width, contentView.frame.size.height)];
     if (self) {
         [self addSubview:contentView];
         UIPanGestureRecognizer *panGestureRecognier = [[UIPanGestureRecognizer alloc]
                                                        initWithTarget:self
                                                        action:@selector(HandlePan:)];
         [self addGestureRecognizer:panGestureRecognier];

         UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
         backBtn.frame = CGRectMake(0, 0, 80, 50);
         [backBtn addTarget:self
                     action:@selector(back:)
           forControlEvents:UIControlEventTouchUpInside];
         [self addSubview:backBtn];

         UIImageView *imageCommentView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"comment.png"]];
         imageCommentView.frame  = CGRectMake(0, 0,
                                                     self.frame.size.width,
                                                     self.frame.size.height);
         commentView = [[CommentView alloc] initWithView:imageCommentView parentView:self];
         commentView.center = CGPointMake(480, 230);
         [[commentView layer] setShadowOffset:CGSizeMake(10, 10)];
         [[commentView layer] setShadowRadius:20];
         [[commentView layer] setShadowOpacity:1];
         [[commentView layer] setShadowColor:[UIColor blackColor].CGColor];
         [self addSubview:commentView];
         isPanComment = NO;

     }

     self.parentView = parentView;
     return self;
 }


 - (void)HandlePan:(UIPanGestureRecognizer*)panGestureRecognizer{

     CGPoint translation = [panGestureRecognizer translationInView:self.parentView];
     float x = self.center.x + translation.x;
     if (x < 160) {
         x = 160;
     }

     if(translation.x > 0){
         if (!isPanComment) {
             self.center = CGPointMake(x, 230);
         }
     }

     if (translation.x < 0 && self.center.x > 160) {
         if (!isPanComment) {
             self.center = CGPointMake(x, 230);
         }
     }else if(translation.x < 0){
         isPanComment = YES;
         commentView.center = CGPointMake(commentView.center.x + translation.x, 230);
     }

     if (commentView.center.x < 480 && translation.x > 0) {
         isPanComment = YES;
         commentView.center = CGPointMake(commentView.center.x + translation.x, 230);
     }

     if (panGestureRecognizer.state == UIGestureRecognizerStateEnded) {
         if (commentView.center.x < 400) {
             [UIView animateWithDuration:0.4
                                   delay:0.1
                                 options:UIViewAnimationCurveEaseInOut
                              animations:^(void){
                                  commentView.center = CGPointMake(160, 230);
                              }completion:^(BOOL finish){
                                  isPanComment = NO;
                              }];
         }else{
             [UIView animateWithDuration:0.4
                                   delay:0.1
                                 options:UIViewAnimationCurveEaseInOut
                              animations:^(void){
                                  commentView.center = CGPointMake(480, 230);
                              }completion:^(BOOL finish){
                                  isPanComment = NO;
                              }];
         }
         if (self.center.x > 190) {
             [UIView animateWithDuration:0.4
                                   delay:0.1
                                 options:UIViewAnimationCurveEaseInOut
                              animations:^(void){
                                  self.center = CGPointMake(480, 230);
                              }completion:^(BOOL finish){
                                  [self.parentView exchangeSubviewAtIndex:1 withSubviewAtIndex:2];
                              }];
         }else{
             [UIView animateWithDuration:0.4
                                   delay:0.1
                                 options:UIViewAnimationCurveEaseInOut
                              animations:^(void){
                                  self.center = CGPointMake(160, 230);
                              }completion:^(BOOL finish){

                              }];

         }

     }

     [panGestureRecognizer setTranslation:CGPointZero inView:self.parentView];

 }

 - (void) back:(id)sender{
     [UIView animateWithDuration:0.4
                           delay:0.1
                         options:UIViewAnimationCurveEaseInOut
                      animations:^(void){
                          self.center = CGPointMake(480, 230);
                      }completion:^(BOOL finish){
                          [self.parentView exchangeSubviewAtIndex:1 withSubviewAtIndex:2];
                      }];
 }

 /*
 // Only override drawRect: if you perform custom drawing.
 // An empty implementation adversely affects performance during animation.
 - (void)drawRect:(CGRect)rect
 {
     // Drawing code
 }
 */

 @end

3、评论页的view和内容页的代码差不多

代码还有很多值得优化的地方，现在只是展示实现了功能，手势判断部分代码比较乱，只要掌握了手势的原来，代码可以自己根据需求来修改

代码：

Github：https://github.com/schelling/NeteaseNews

CSDN资源：http://download.csdn.net/detail/totogo2010/5110546

容芳志 (http://blog.csdn.net/totogo2010)

本文遵循“署名-非商业用途-保持一致”创作公用协议