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[操作系统]iOS菜单滚动联动内容区域功能实现


平时开发APP中关于此功能还是比较经常碰到,本实例借用三个开源的插件,并对其中一个进行修改调整实现出想要的效果;本文重点介绍修改的内容跟三个插件的运用,这三个插件还可以各自扩展到其它项目的运用;

效果图:

 

本实例实现的效果:顶部的滚动菜单显示出所有的类型,每个类型都对应一种展示,可以在顶部的菜单进行滚动,内容区域也会跟着改变,或者是内容区域左右滑动,则顶部的滚动菜单也会跟着更改,顶部菜单的最右边有一个展示更多菜单的效果,用于弹出一个带箭头的窗;(源代码下载)

 带箭头的弹出视图插件 :https://github.com/xiekw2010/DXPopover

 内容区域滑动插件:https://github.com/nicklockwood/iCarousel

 及Codint.Net开源项目中的XTSegmentControl菜单滚动效果,此实例对它进行的修改

1:插件及页面的初始化

#import "ViewController.h"#import "oldChildVewController.h"#import "ChildViewController.h"#import "newChildVewController.h"#import "XTSegmentControl.h"#import "iCarousel.h"#import "Masonry.h"#import "menuCollectionViewCell.h"#import "DXPopover.h"#define kScreen_Height [UIScreen mainScreen].bounds.size.height#define kScreen_Width [UIScreen mainScreen].bounds.size.width#define kMySegmentControl_Height 44.0@interface ViewController ()<UICollectionViewDataSource, UICollectionViewDelegate,iCarouselDataSource, iCarouselDelegate>@property (strong, nonatomic) XTSegmentControl *mySegmentControl;@property (strong, nonatomic) NSArray *titlesArray;@property (strong, nonatomic) iCarousel *myCarousel;@property(assign,nonatomic)NSInteger curSelectIndex;@property (nonatomic, strong) DXPopover *popover;@property(assign,nonatomic)CGFloat popoverWidth;@property (strong, nonatomic) UICollectionView *myCollectionView;@end@implementation ViewController- (void)viewDidLoad {  [super viewDidLoad];    self.view.backgroundColor=[UIColor whiteColor];    //初始化一个popover 用于弹窗效果的展示  self.popover = [DXPopover new];  _popoverWidth = kScreen_Width-20;    __weak typeof(self) weakSelf = self;  CGRect frame=self.view.bounds;    //内容区滚动效果插件  self.myCarousel = ({    iCarousel *icarousel = [[iCarousel alloc] initWithFrame:frame];    icarousel.dataSource = self;    icarousel.delegate = self;    icarousel.decelerationRate = 1.0;    icarousel.scrollSpeed = 1.0;    icarousel.type = iCarouselTypeLinear;    icarousel.pagingEnabled = YES;    icarousel.clipsToBounds = YES;    icarousel.bounceDistance = 0.2;    [self.view addSubview:icarousel];    [icarousel mas_makeConstraints:^(MASConstraintMaker *make) {      make.edges.equalTo(self.view).insets(UIEdgeInsetsMake(64, 0, 0, 0));    }];    icarousel;  });    //添加滑块  __weak typeof(_myCarousel) weakCarousel = _myCarousel;  self.mySegmentControl = [[XTSegmentControl alloc] initWithFrame:CGRectMake(0, 20, kScreen_Width, 44) Items:self.titlesArray showRightButton:YES selectedBlock:^(NSInteger index) {    weakSelf.curSelectIndex=index;    weakCarousel.currentItemIndex=index;    [weakSelf.myCollectionView reloadData];  }];  //当有右边键时 其响应的事件  self.mySegmentControl.rightButtonBlock= ^(CGRect rightButtomRect)  {    //弹出插件的运用    [weakSelf updateMyViewFrame];    CGPoint startPoint =    CGPointMake(CGRectGetMidX(rightButtomRect), CGRectGetMaxY(rightButtomRect) + 25);    [weakSelf.popover showAtPoint:startPoint          popoverPostion:DXPopoverPositionDown         withContentView:weakSelf.myCollectionView              inView:weakSelf.view];  };  [self.view addSubview:self.mySegmentControl];    //用于展示弹出效果里面的列表  if (!_myCollectionView) {    UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];    self.myCollectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0,50,kScreen_Width-40, 200) collectionViewLayout:layout];    self.myCollectionView.backgroundColor=[UIColor whiteColor];    self.myCollectionView.showsHorizontalScrollIndicator=NO;    self.myCollectionView.showsVerticalScrollIndicator=NO;    [self.myCollectionView registerClass:[menuCollectionViewCell class] forCellWithReuseIdentifier:NSStringFromClass([menuCollectionViewCell class])];    self.myCollectionView.dataSource = self;    self.myCollectionView.delegate = self;  }}

其中XTSegmentControl为顶部菜单的创建,其中showRightButton是为了扩展是否显示右边更多菜单的事件,并把事件的响应Block到页面进行实现,此事例就是响应弹出窗的效果展现,iCarousel为内容区域的滑动效果,DXPopover弹出窗的效果,UICollectionView则用于弹出窗里面的菜单列表

//popver一些属性的设置-(void)updateMyViewFrame{  CGRect tableViewFrame = self.myCollectionView.frame;  tableViewFrame.size.width = _popoverWidth;  self.myCollectionView.frame = tableViewFrame;  self.popover.contentInset = UIEdgeInsetsZero;  self.popover.backgroundColor = [UIColor whiteColor];}#pragma mark - Getter/Setter- (NSArray*)titlesArray{  if (nil == _titlesArray) {      _titlesArray = @[@"全部", @"互动", @"开源控件", @"文档", @"代码", @"高尔夫",@"主题",@"软件",@"股票"];  }  return _titlesArray;}

2插件iCarouselDataSource, iCarouselDelegate代码实现

#pragma mark iCarousel M- (NSUInteger)numberOfItemsInCarousel:(iCarousel *)carousel{  return [self.titlesArray count];}//滚动时内容视图的加载- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view{  [_mySegmentControl setScrollOffset:index];  UIViewController *childContrll=[[ChildViewController alloc]init];  UIView *my=childContrll.view;  switch (index) {    case 0:    {      my.backgroundColor=[UIColor blackColor];      break;    }    case 1:    {      my.backgroundColor=[UIColor redColor];      break;    }    default:      childContrll=[[newChildVewController alloc]init];      break;  }  return childContrll.view;}//滚动时 下划线的位置更新- (void)carouselDidScroll:(iCarousel *)carousel{  if (_mySegmentControl) {    [_mySegmentControl moveIndexWithProgress];  }}//更新滚动其它两个控件的位置- (void)carouselCurrentItemIndexDidChange:(iCarousel *)carousel{  self.curSelectIndex=carousel.currentItemIndex;  [self.myCollectionView reloadData];  if (_mySegmentControl) {    _mySegmentControl.currentIndex = carousel.currentItemIndex;  }}

注意:内容区域的视图加载,及其滑动所响应的事件处理,原来的XTSegmentControl对于菜单字数不同时下划线会出现一些异常,本实例对它进行修改了;

3:列表UICollectionViewDataSource, UICollectionViewDelegate功能的实现

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{  return self.titlesArray.count;}- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{  menuCollectionViewCell *ccell = [collectionView dequeueReusableCellWithReuseIdentifier:NSStringFromClass([menuCollectionViewCell class]) forIndexPath:indexPath];  NSString *model=[self.titlesArray objectAtIndex:indexPath.row];  ccell.curMenuModel=model;  if (self.curSelectIndex==indexPath.row) {    ccell.backgroundColor=[UIColor blueColor];  }  else  {    ccell.backgroundColor=[UIColor whiteColor];  }  return ccell;}- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{  return CGSizeMake((kScreen_Width-40)/3, 40);}- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{  return UIEdgeInsetsZero;}- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{  return 5;}- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{  return 5;}- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{  self.curSelectIndex=indexPath.row;  //两个滚动的位置更新  _myCarousel.currentItemIndex=self.curSelectIndex;  [_mySegmentControl selectIndex:self.curSelectIndex];  //隐藏弹出窗  [self.popover dismiss];}

注意:主要是在实现点击时滚动位置跟内容的区域要进行调整,并把弹出窗进行收缩的操作;

4:XTSegmentControl下划线调整

- (void)moveIndexWithProgress{  CGRect origionRect = [_itemFrames[_currentIndex] CGRectValue];    CGRect origionLineRect = CGRectMake(CGRectGetMinX(origionRect) + XTSegmentControlHspace, CGRectGetHeight(origionRect) - XTSegmentControlLineHeight, CGRectGetWidth(origionRect) - 2 * XTSegmentControlHspace, XTSegmentControlLineHeight);    //增加下划线滚动的效果  [UIView animateWithDuration:0.5 animations:^{    _lineView.frame = origionLineRect;  } completion:^(BOOL finished) {      }];  }

5:扩展XTSegmentControl没有右边更多菜单的效果

  self.mySegmentControl = [[XTSegmentControl alloc] initWithFrame:CGRectMake(0, 20, kScreen_Width, 44) Items:self.titlesArray showRightButton:NO selectedBlock:^(NSInteger index) {    weakSelf.curSelectIndex=index;    weakCarousel.currentItemIndex=index;    [weakSelf.myCollectionView reloadData];  }];

效果图: