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;
- @property (nonatomic, strong) UIView *contentView;
- @end
-
- #import "DetailView.h"
- #import "CommentView.h"
- #import <QuartzCore/QuartzCore.h>
-
- @implementation DetailView
-
- - (id)initWithFrame:(CGRect)frame
- {
- self = [super initWithFrame:frame];
- if (self) {
-
- }
- 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];
- }];
- }
-
-
- @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)