女主宣言作为一名iOS开发,最常用到的就是分页控制器了,类似于新闻首页;最近所接触的项目中经常会遇到滚动分页的设计效果,被用来对不同数据界面的展示进行分类。因此,总结了一下iOS中关于分页界面搭建的知识点。
首先我们先可以来预览一下实现效果:
实现分析
根据动图进行实现分析:这个效果的实现分为两部分顶部的QiPageMenuView和内容展示部分QiPageContentView:
QiPageMenuView是基于UIScrollView实现的,我们可以按照自己的项目需求,定制自己需要实现的效果。QiPageMenuView提供了可设置的属性有:菜单每一项是否根据文字的大小自适应宽度还是设置固定宽度、菜单的首项和最后一项距离父视图的间距、每一项之间的间距、包括了每一项QiPageItem的展示效果自定义等。也实现了菜单项超出一屏幕时自动滑动显示的效果:
QiPageContentView是基于UIPageViewController实现的封装,在项目中可能有多处这样的界面效果。单纯的使用UIPageViewController写在相应的控制器中,添加相应的子控制器,通过实现UIPageViewController的数据源和代理协议也可以达到这种效果。但是UIPageViewController嵌套在主控制器中,耦合度比较高,代码量也比较大,若是多处需要使用这种效果,每次都写一遍UIPageViewController,效率和可移植性不高。QiPageMenuView和QiPageContentView之间是解耦合的,彼此都可以作为单独的控件去使用。在设计构思时,菜单视图的样式有可能是QiPageMenuView样式之外的视图,若是两者耦合度太高,就变成了QiPageContentView + QiPageMenuView组合,能展现的效果就被限制了。
QiPageMenuView实现与使用
1.QiPageMenuView.h中展现了QiPageMenuView可实现定制的相关属性以及初始化方法介绍。
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@interface QiPageMenuView : UIScrollView<QiPageControllerDelegate>
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/**
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菜单栏点击事件
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*/
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@property (nonatomic,copy)void(^pageItemClicked)(NSInteger clickedIndex,QiPageMenuView *menu);
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/**
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常态item的字体颜色
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*/
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@property (nonatomic,strong)UIColor *normalTitleColor;
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/**
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选中item的字体颜色
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*/
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@property (nonatomic,strong)UIColor *selectedTitleColor;
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/**
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常态item的字体
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*/
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@property (nonatomic,strong)UIFont *titleFont;
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/**
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选中Item的字体
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*/
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@property (nonatomic,strong)UIFont *selectedTitleFont;
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/**
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字体距离item两边的间距,itemsAutoResizing = YES时 设置有效
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*/
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@property (nonatomic,assign)CGFloat itemTitlePadding;
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/**
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item距上的间距。itemIsVerticalCentred = NO的时候设置有效
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*/
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@property (nonatomic,assign)CGFloat itemTopPadding;
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/**
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items的左边缩进
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*/
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@property (nonatomic,assign)CGFloat leftMargin;
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/**
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items的右边缩进
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*/
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@property (nonatomic,assign)CGFloat rightMargin;
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/**
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是否根据文字的长度自动计算item的width default YES
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*/
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@property (nonatomic,assign)BOOL itemsAutoResizing;
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/**
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item是否垂直居中显示,默认yes; itemTopPadding 与 lineTopPadding 不会生效;设置NO itemHeight会自适应高
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*/
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@property (nonatomic,assign)BOOL itemIsVerticalCentred;
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/**
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item之间的间距
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*/
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@property (nonatomic,assign)CGFloat itemSpace;
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/**
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每个item的高度
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*/
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@property (nonatomic,assign)CGFloat itemHeight;
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/**
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每个item的宽度。itemsAutoResizing = YES不必赋值也可。反之必须给值。
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*/
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@property (nonatomic,assign)CGFloat itemWidth;
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/**
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是否显示下划线 default YES
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*/
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@property (nonatomic,assign)BOOL hasUnderLine;
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/**
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下划线颜色
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*/
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@property (nonatomic,strong)UIColor *lineColor;
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/**
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下划线到item的间距
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*/
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@property (nonatomic,assign)CGFloat lineTopPadding;
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/**
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下划线的高度
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*/
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@property (nonatomic,assign)CGFloat lineHeight;
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/**
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下划线的宽度
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*/
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@property (nonatomic,assign)CGFloat lineWitdh;
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/**
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pageController滑动完成
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*/
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@property (nonatomic,assign)NSInteger pageScrolledIndex;
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/**
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初始化方法
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*/
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- (instancetype)initWithFrame:(CGRect)frame titles:(NSArray*)titles dataSource:(NSDictionary<QiPageMenuViewDataSourceKey, id> *)dataSource;
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- (instancetype)initWithFrame:(CGRect)frame titles:(NSArray*)titles;
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/**
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滑动到某一项
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@param pageItem item
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*/
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- (void)scrollToPageItem:(QiPageItem*)pageItem;
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/*!
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@brief 更新标题数组
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@param items selectedIndex重置选中的item
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*/
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- (void)updateMenuViewWithNewItemArray:(NSArray *)items selectedIndex:(NSInteger)selectedIndex;
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@end
2.QiPageMenuView滑动显示的核心代码
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- (void)scrollToPageItem:(QiPageItem*)pageItem {
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[self refreshUnderLineViewPosition:pageItem];
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if (self.contentSize.width <= self.width) {
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return;
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}
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CGRect originalRect = pageItem.frame;
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CGRect convertRect = [self convertRect:originalRect toView:self.superview];
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CGFloat targetX;
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CGFloat realMidX = CGRectGetMinX(originalRect)+CGRectGetWidth(originalRect)/2;
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if (CGRectGetMidX(convertRect) < CGRectGetMidX(self.frame)) {
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//是否需要右滑
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if (realMidX> CGRectGetMidX(self.frame)) {
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targetX = realMidX-CGRectGetMidX(self.frame);
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}else {
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targetX = 0;
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}
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[self setContentOffset:CGPointMake(targetX, 0) animated:YES];
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} else if (CGRectGetMidX(convertRect) > CGRectGetMidX(self.frame)) {
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if (realMidX+CGRectGetMidX(self.frame)<self.contentSize.width) {
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targetX = realMidX-CGRectGetMidX(self.frame);
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} else {
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targetX = self.contentSize.width - CGRectGetMaxX(self.frame);
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}
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[self setContentOffset:CGPointMake(targetX, 0) animated:YES];
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}
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}
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QiPageMenuView使用的两种方式:
方式一:
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//定制样式
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NSDictionary *dataSource = @{
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QiPageMenuViewNormalTitleColor : [UIColor blackColor],
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QiPageMenuViewSelectedTitleColor : [UIColor redColor],
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QiPageMenuViewTitleFont : [UIFont systemFontOfSize:14],
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QiPageMenuViewSelectedTitleFont : [UIFont systemFontOfSize:14],
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QiPageMenuViewItemIsVerticalCentred : @(YES),
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QiPageMenuViewItemTitlePadding : @(10.0),
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QiPageMenuViewItemTopPadding : @(20.0),
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QiPageMenuViewItemPadding : @(10.0),
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QiPageMenuViewLeftMargin : @(20.0),
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QiPageMenuViewRightMargin : @(20.0),
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QiPageMenuViewItemsAutoResizing : @(YES),
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QiPageMenuViewItemWidth : @(90.0),
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QiPageMenuViewItemHeight : @(40.0),
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QiPageMenuViewHasUnderLine :@(YES),
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QiPageMenuViewLineColor : [UIColor greenColor],
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QiPageMenuViewLineWidth : @(30.0),
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QiPageMenuViewLineHeight : @(4.0),
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QiPageMenuViewLineTopPadding : @(10.0)
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};
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QiPageMenuView *menuView = [[QiPageMenuView alloc]initWithFrame:CGRectMake(0, 0, self.view.width, 50) titles:@[@"消息",@"节日消息",@"广播通知",@"QISHARE",@"奇舞团"] dataSource:dataSource];
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menuView.backgroundColor = [UIColor orangeColor];
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[self.view addSubview:menuView];
方式二:
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QiPageMenuView *menuView = [[QiPageMenuView alloc]initWithFrame:CGRectMake(0, 0, self.view.width, 50) titles:@[@"系统消息",@"节日消息",@"广播通知"]];
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menuView.backgroundColor = [UIColor orangeColor];
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//定制样式
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menuView.normalTitleColor = [UIColor blackColor];
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menuView.selectedTitleColor = [UIColor redColor];
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menuView.titleFont = [UIFont systemFontOfSize:14];
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menuView.selectedTitleFont = [UIFont systemFontOfSize:14];
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menuView.itemIsVerticalCentred = YES;
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menuView.itemTitlePadding = 10.0;
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menuView.itemTopPadding = 20.0;
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menuView.itemSpace = 10.0;
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menuView.leftMargin = 20.0;
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menuView.rightMargin = 20.0;
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menuView.itemsAutoResizing = YES;
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menuView.itemWidth = 90;
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menuView.itemHeight = 40;
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menuView.hasUnderLine = YES;
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menuView.lineColor = [UIColor greenColor];
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menuView.lineWitdh = 30;
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menuView.lineHeight = 4.0;
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menuView.lineTopPadding = 10;
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[self.view addSubview:menuView];
QiPageContentView实现与使用
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QiPageContentView.h
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@interface QiPageContentView : UIView<UIPageViewControllerDelegate, UIPageViewControllerDataSource,UIScrollViewDelegate>
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@property (nonatomic, strong) UIPageViewController *pageViewController;
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@property (nonatomic, strong) NSArray *controllerArray; //!< 控制器数组
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/**
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滑动结束:block回调
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*/
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@property (nonatomic,copy)void(^pageContentViewDidScroll)(NSInteger currentIndex,NSInteger beforeIndex,QiPageContentView *pageView);
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/**
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滑动结束:代理回调 若实现block代理不会走
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*/
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@property (nonatomic, weak) id<QiPageContentViewDelegate> contentViewDelgate;
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/**
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设置滑动至某一个控制器
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@param index index
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@param beforeIndex 控制方向
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*/
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- (void)setPageContentShouldScrollToIndex:(NSInteger)index beforIndex:(NSInteger)beforeIndex;
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/**
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初始化方法
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@param frame frame
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@param childViewControllers childViewControllers
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@return 实例
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*/
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- (instancetype)initWithFrame:(CGRect)frame childViewController:(NSArray*)childViewControllers;
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@end
2. QiPageContentView使用
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QiPageContentView *contenView = [[QiPageContentView alloc]initWithFrame:CGRectMake(0, 10, self.view.width, self.view.height - 88-10) childViewController:@[ctrl,ctrl1,ctrl2,ctrl3]];
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[self.view addSubview:contenView];
QiPageContentView与QiPageMenuView解耦
QiPageContentView与QiPageMenuView使用各自头文件中定义的协议或者block属性实现两者之间事件交互,从而达到分页联动效果;两者的解耦,使得它们的使用更加灵活。
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QiPageMenuView交互事件的传递
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@protocol QiPageMenuViewDelegate <NSObject>
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/**
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菜单点击了某个item
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@param index 点击了index
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*/
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- (void)pageMenuViewDidClickedIndex:(NSInteger)index beforeIndex:(NSInteger)beforeIndex;
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@end
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@interface QiPageMenuView : UIScrollView
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/**
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菜单栏点击事件:block回调
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*/
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@property (nonatomic,copy)void(^pageItemClicked)(NSInteger clickedIndex,NSInteger beforeIndex,QiPageMenuView *menu);
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/**
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菜单栏点击事件:代理回调 若实现block代理不会走
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*/
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@property (nonatomic, weak) id<QiPageMenuViewDelegate> menuViewDelgate;
2.QiPageContentView交互事件的传递
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@protocol QiPageContentViewDelegate <NSObject>
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/**
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滑动完成回调
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@param index 滑动至index
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*/
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- (void)pageContentViewDidScrollToIndex:(NSInteger)index beforeIndex:(NSInteger)beforeIndex;
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@end
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@interface QiPageContentView : UIView<UIPageViewControllerDelegate, UIPageViewControllerDataSource,UIScrollViewDelegate>
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@property (nonatomic, strong) UIPageViewController *pageViewController;
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@property (nonatomic, strong) NSArray *controllerArray; //!< 控制器数组
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/**
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滑动结束:block回调
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*/
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@property (nonatomic,copy)void(^pageContentViewDidScroll)(NSInteger currentIndex,NSInteger beforeIndex,QiPageContentView *pageView);
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/**
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滑动结束:代理回调 若实现block代理不会走
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*/
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@property (nonatomic, weak) id<QiPageContentViewDelegate> contentViewDelgate;
3.QiPageContentView和QiPageMenuView组合实现分页界面
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QiPageMenuView *menuView = [[QiPageMenuView alloc]initWithFrame:CGRectMake(0, 0, self.view.width, 50) titles:@[@"系统消息",@"节日消息",@"广播通知",@"最新",@"最热"] dataSource:dataSource];
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menuView.backgroundColor = [UIColor orangeColor];
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[self.view addSubview:menuView];
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QiPageContentView *contenView = [[QiPageContentView alloc]initWithFrame:CGRectMake(0, menuView.bottom+10, self.view.width, self.view.height - menuView.bottom - 10 - 88-10) childViewController:@[ctrl,ctrl1,ctrl2,ctrl3,ctrl4]];
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[self.view addSubview:contenView];
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menuView.pageItemClicked = ^(NSInteger clickedIndex, NSInteger beforeIndex, QiPageMenuView *menu) {
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NSLog(@"点击了:之前:%ld 现在:%ld",beforeIndex,clickedIndex);
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[contenView setPageContentShouldScrollToIndex:clickedIndex beforIndex:beforeIndex];
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};
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contenView.pageContentViewDidScroll = ^(NSInteger currentIndex, NSInteger beforeIndex, QiPageContentView * _Nonnull pageView) {
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menuView.pageScrolledIndex = currentIndex;
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NSLog(@"滚动了:之前:%ld 现在:%ld",beforeIndex,currentIndex);
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};