自定义导航控制器的titleView实现多控制器的切换

来源：互联网发布：如何选购基金知乎编辑：程序博客网时间：2024/05/18 01:53

在很多应用中都有通过自定义navigationItem的titleView,来实现多个控制器的切换管理.主要实现这个功能需要注意一下两个方面:

一,自定义titleView,里面包含两个按钮,监听点击事件,切换到哪个控制器

二,scrollView确定滚动的范围,有几个控制器就设置contentSize有多大

三,切换的控制器view,添加到scrollView上,使得在滚动的时候可以切换控制器

四,设置当前的控制的addChildViewController为要切换的控制器

五,实现scrollView的代理方法,当结束拖动的时候,重新给titleView的下面的滑动条设置位置

代码如下:

#import "ViewController.h"#import "WTNavViewController.h"#import "WTOneViewController.h"#import "WTTwoViewController.h"/**获取屏幕的宽度NSInteger*/#define CurrentScreenWidth [UIScreen mainScreen].bounds.size.width/**获取屏幕的高度NSInteger*/#define CurrentScreenHeight [UIScreen mainScreen].bounds.size.height@interface ViewController ()<UIScrollViewDelegate>@property (nonatomic,strong) UIView *topBgView;@property (nonatomic,strong) UIScrollView *scrollView;@property (nonatomic,strong) WTTwoViewController *two;@property (nonatomic,strong) WTOneViewController *one;@end@implementation ViewController/** *  初始化控制器 */-(WTTwoViewController *)two{    if (_two == nil) {        _two = [[WTTwoViewController alloc] init];        _two.view.frame = CGRectMake(CurrentScreenWidth, 0, CurrentScreenWidth, CurrentScreenHeight);        _two.view.clipsToBounds = YES;            }    return _two;}-(WTOneViewController *)one{    if (_one == nil) {        _one = [[WTOneViewController alloc] init];        _one.view.frame = CGRectMake(0, 0, CurrentScreenWidth, CurrentScreenHeight);        _one.view.clipsToBounds = YES;    }    return _one;}- (void)viewDidLoad {    [super viewDidLoad];    self.view.backgroundColor = [UIColor whiteColor];    //创建中间文字    [self createTitleView];    //创建scrollView    [self createScrollView];}/** * 创建scrollView */-(void)createScrollView{    self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, CurrentScreenWidth, CurrentScreenHeight )];    self.scrollView.contentSize = CGSizeMake(CurrentScreenWidth * 2, CurrentScreenHeight);    self.scrollView.showsVerticalScrollIndicator = NO;    self.scrollView.showsHorizontalScrollIndicator = NO;    self.scrollView.bounces = NO;    self.scrollView.pagingEnabled = YES;    [self.view addSubview:self.scrollView];        self.scrollView.delegate = self;        //注册控制器    [self configSonViewController];}/** *  创建中间文字 */-(void)createTitleView{    self.topBgView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 120, 26)];    self.topBgView.userInteractionEnabled = YES;        NSArray *titleArray = @[@"IOS",@"安卓"];    int i = 0;    for (NSString *title in titleArray) {        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];        btn.frame = CGRectMake(i * 53, 0, 58, 26);        [btn setTitle:title forState:UIControlStateNormal];        btn.tag = i;        [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];        [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];                [btn addTarget:self action:@selector(titleViewSele:) forControlEvents:UIControlEventTouchUpInside];        [self.topBgView addSubview:btn];                i++;    }        UIView *indView = [[UIView alloc] initWithFrame:CGRectMake(14, 30, 30, 2)];    indView.backgroundColor = [UIColor redColor];    indView.tag = 99;    [self.topBgView addSubview:indView];    self.navigationItem.titleView = self.topBgView;}/** *  选择哪个控制器 */-(void)titleViewSele:(UIButton *)btn{    NSInteger ss = 0;    switch (btn.tag) {        case 0:        {            ss = 14;            self.scrollView.contentOffset = CGPointMake(0, 0);        }            break;        case 1:        {            ss = 65;            self.scrollView.contentOffset = CGPointMake(CurrentScreenWidth, 0);        }                    default:            break;    }    UIView *indView = (UIView *)[_topBgView viewWithTag:99];    CGRect inFrame = indView.frame;    inFrame.origin.x = ss;    [UIView animateWithDuration:0.2 animations:^{        indView.frame = inFrame;    }];    }#pragma mark - 代理方法-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{    NSInteger ss = 0;    if (self.scrollView.contentOffset.x == 0) {        ss = 14;    }else{        ss = 65;    }        UIView *indView = (UIView *)[_topBgView viewWithTag:99];    CGRect inFrame = indView.frame;    inFrame.origin.x = ss;    [UIView animateWithDuration:0.2 animations:^{        indView.frame = inFrame;    }];}/** *  注册控制器 */-(void)configSonViewController{    [self.scrollView addSubview:self.one.view];    [self.scrollView addSubview:self.two.view];        [self addChildViewController:self.one];    [self addChildViewController:self.two];}

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