从0开始架构一个IOS程序—— 05— NavigationBar 搭建首页面

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从0开始架构一个IOS程序 05 NavigationBar搭建首页面

Mac OSX 10.11 之后

效果

在这里的实现思路

创建 navigationItem titleView
添加ViewController
关联 UIScrollView

1 创建 navigationItem titleView

1.1 WISHomeTopBarView.h

#import <UIKit/UIKit.h>typedef NS_ENUM(NSUInteger,WISHomeTopType){    WISHomeTopTypeDefault=0};@class WISHomeTopBarView;//定义block回调typedef void(^WISHomeTopBlock)(UIButton *topBar,WISHomeTopType idx);//定义代理@protocol WISHomeTopBarDelegate <NSObject>-(void) topBar:(UIButton *) button clickIndex:(WISHomeTopType) idx;@end@interface WISHomeTopBarView : UIView//block回调@property(copy,nonatomic) WISHomeTopBlock block;//代理回调@property(weak,nonatomic) id<WISHomeTopBarDelegate> topBarDelegate;//创建设置标签- (instancetype)initWithFrame:(CGRect)frame titleNames:(NSArray*) titles;//修改标签的位置-(void) scrollChangTopBar:(NSInteger) tag;@end

1.2 WISHomeTopBarView.m

在这里的实现思路是

也就是自定义了一个UIView,然后通过传入的数组中的显示标签来动态的向其中创建添加UIButton

#import "WISHomeTopBarView.h"@interface WISHomeTopBarView()//tabBar条目数据集合@property(nonatomic,strong) NSMutableArray *dataList;//标签下的指示线@property(nonatomic,strong) UIView *lineView;@end@implementation WISHomeTopBarView//初始化创建view- (instancetype)initWithFrame:(CGRect)frame titleNames:(NSArray*) titles{    self = [super initWithFrame:frame];    if (self) {        //每个item的宽度        CGFloat width = self.width/titles.count;        //item的高度        CGFloat height = self.height;        for (NSInteger i=0; i<titles.count; i++) {            //创建Button            //创建Button            UIButton *button =[UIButton buttonWithType:UIButtonTypeCustom];            //设置文字            NSString *title = titles[i];            [button setTitle:title forState:UIControlStateNormal];            //设置按钮文字颜色            [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];            //设置按钮字体            button.titleLabel.font=[UIFont systemFontOfSize:18];            //设置frame            button.frame=CGRectMake(i*width, 0, width, height);            //设置点击事件            [button addTarget:self action:@selector(titleClick:) forControlEvents:UIControlEventTouchUpInside];            //tag            button.tag = i;            //添加到数组中            [self.dataList addObject:button];            //添加            [self addSubview:button];            //创建标签下的小白线条            //默认显示到中间            if (i==1) {                CGFloat h=2;                CGFloat y=40;                [button.titleLabel sizeToFit];                self.lineView = [[UIView alloc]init];                self.lineView.backgroundColor=[UIColor whiteColor];                self.lineView.height=h;                self.lineView.width=button.titleLabel.width;                self.lineView.top = y;                self.centerX=button.centerX;                [self addSubview:self.lineView];                self.centerX=button.centerX;            }        }    }    return self;}//懒加载机制-(NSMutableArray *)dataList{    if (!_dataList) {        _dataList = [NSMutableArray array];    }    return _dataList;}//UIScrollview滑动回调改变标签下的小白线的位置-(void)scrollChangTopBar:(NSInteger)tag{    //获取对应tag下的UIButton    UIButton *button = self.dataList[tag];    //将小标签下的小白线与UIButton对齐    [UIView animateWithDuration:0.5 animations:^{        self.lineView.centerX=button.centerX;    }];}//本View中（navigationItem.view）条目的点击事件-(void) titleClick:(UIButton*) button{    //block函数回调    if(self.block){        self.block(button, button.tag);    }    //代理方法回调    if ([self.topBarDelegate respondsToSelector:@selector(topBar:clickIndex:)]) {        [self.topBarDelegate topBar:button clickIndex:button.tag];    }    //移动小白条    [UIView animateWithDuration:0.5 animations:^{        self.lineView.centerX=button.centerX;    }];}@end

2 将WISHomeTopBarView 添加到显示视图 WISHomeViewController中

2.1 WISHomeViewController.h

//CXBaseViewController.h 继承于UIViewController#import "CXBaseViewController.h"@interface WISHomeViewController : CXBaseViewController@end

2.1 WISHomeViewController.m

根布局下添加了UIScrollView
实现自定义代理协议 WISHomeTopBarDelegate （监听WISHomeTopBarView 中item的点击回调）

@interface WISHomeViewController ()<UIScrollViewDelegate,WISHomeTopBarDelegate>//头部标签显示文字@property(strong,nonatomic) NSArray *topDataList;//头部标签控件@property(strong,nonatomic) WISHomeTopBarView *topBarView;//加载Controller的布局文件@property(strong,nonatomic) IBOutlet UIScrollView *contentScrollView;@end

@implementation WISHomeViewController-(NSArray *)topDataList{    if (!_topDataList) {        _topDataList= @[@"推荐",@"文章",@"视频"];    }    return _topDataList;}-(WISHomeTopBarView *)topBarView{    if (!_topBarView) {        _topBarView = [[WISHomeTopBarView alloc]initWithFrame:CGRectMake(0,0, 200, 50) titleNames:self.topDataList];        //设置按键的点击回调        _topBarView.topBarDelegate=self;        //设置block回调        _topBarView.block = ^(UIButton *topBar, WISHomeTopType idx) {            NSLog(@"block 数据回调 ");        };    }    return _topBarView;}- (void)viewDidLoad {    [super viewDidLoad];    //1 设置navigationBar 的颜色    [self.navigationController.navigationBar setBarTintColor:[UIColor colorWithHexString:@"#4169E1"]];    [self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],UITextAttributeTextColor,nil]];    //2 加载设置头标签    self.navigationItem.titleView=self.topBarView;    //3 添加子视图    //WISHomeRecommendViewController    //WISHomeArtViewController    //WISHomeVideoViewController     //是已创建好的子视图控制器    NSArray *array = @[@"WISHomeRecommendViewController",@"WISHomeArtViewController",@"WISHomeVideoViewController"];    for (NSInteger i=0; i<array.count; i++) {        //取出数据        NSString *item = array[i];        //创建        UIViewController *controller = [[NSClassFromString(item) alloc] init];        //设置标题        controller.title = self.topDataList[i];        [self addChildViewController:controller];    }    //将子控制器的View添加到MainView的scrollView中    //4 设置scrollview的contentsize    self.contentScrollView.contentSize=CGSizeMake([UIScreen mainScreen].bounds.size.width*self.topDataList.count, 0);    //5 设置uiscrollView的代理    self.contentScrollView.delegate=self;    //进入主控制器的第一个页面    [self scrollViewDidEndDecelerating:self.contentScrollView];}-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{    //每一个子控制器的宽度    CGFloat width =scrollView.frame.size.width;    //每一个子控制器的高度    CGFloat height =[UIScreen mainScreen].bounds.size.height;    //获取当前索引值    NSInteger idx = scrollView.contentOffset.x/width;    //设置联动    [self.topBarView scrollChangTopBar:idx];    //根据索引值返回引用    UIViewController *vc=self.childViewControllers[idx];    //判断当前的vc是否执行过viewLoaded    if([vc isViewLoaded]){        return;    }else{        //设置子控制器的视图大小        vc.view.frame=CGRectMake(scrollView.contentOffset.x, 0, scrollView.frame.size.width, height);        //将子控制器的view加入到scrollview中        [scrollView addSubview:vc.view];    }}//滑动减速结束//调用加载子控制器的view的方法-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{    NSLog(@"滑动结束 ...");    [self scrollViewDidEndScrollingAnimation:scrollView];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}//头部标签点击代理回调-(void)topBar:(UIButton *)button clickIndex:(WISHomeTopType)idx{    NSLog(@"click === ");    CGPoint point = CGPointMake((idx-WISHomeTopTypeDefault)*[UIScreen mainScreen].bounds.size.width, self.contentScrollView.contentOffset.y);    [self.contentScrollView setContentOffset:point animated:YES];}/* #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. } */@end

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