ios UINavigationController 导航栏

添加全屏侧滑返回

.获取到系统的pop返回手势

.获取pop在哪个view上

.获取target,action

.自定义UIPanGestureRecognizer

//1.获取手势

guard let pop = interactivePopGestureRecognizer else { return }

//2.获取手势的view

guard let gesView = pop.view else { return }

//3.获取target/action

let targets = pop.value(forKey: "_targets") as? [NSObject]

let targetObj = targets?.first

if targetObj == nil { return }

//3.1.target

guard let target = targetObj?.value(forKey: "target") else { return }

//3.2.取出Action

let action = Selector(("handleNavigationTransition:"))

//4.自己创建手势

let pan = UIPanGestureRecognizer(target: target, action: action)

gesView.addGestureRecognizer(pan)

1.关于导航栏左右两边的按钮

.隐藏导航栏上的返回字体

//Swift

UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(, -), forBarMetrics: .Default)

//OC

[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(, -) forBarMetrics:UIBarMetricsDefault];

//设置导航栏右边有2个按钮

UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:view];

self.navigationItem.rightBarButtonItem = item;

系统默认的rightBarButtonItem边距

self.navigationItem.leftBarButtonItem.imageInsets = UIEdgeInsetsMake(,-,,);

self.navigationItem.rightBarButtonItem.imageInsets = UIEdgeInsetsMake(,-,,);

//使左边导航栏按钮位置更加左边一点

{

    UIView *left = [[UIView alloc] init];

    left.frame = CGRectMake(, , , );

    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:left];

    //使导航栏按钮位置更加左边或者右边

    UIBarButtonItem *nagetiveSpacer = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];

    nagetiveSpacer.width = -;//这个值可以根据自己需要自己调整

    self.navigationItem.leftBarButtonItems = @[nagetiveSpacer,item];

}

UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:back];

item.width = -;

2.修改标题

//标题颜色

self.navigationController.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName : [UIColor someColor]}

//设置了导航条背景颜色，会导致按钮标题颜色改变，通过以下方法修改

导航栏子控件颜色

self.navigationController.navigationBar.tintColor = [UIColor someColor];

修改导航条背景颜色

self.navigationController.navigationBar.barTintColor = [UIColor colorWithHexString:@"#2295f2"];

//设置导航控制器标题的颜色和字体大小等

NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:

[UIColor whiteColor],NSForegroundColorAttributeName,

[UIFont systemFontOfSize:17],NSFontAttributeName,nil];

[self.navigationController.navigationBar setTitleTextAttributes:attributes];

3.在滑动过程中隐藏navigationbar

() 像safari

self.navigationController.hidesBarsOnSwipe = YES;

()

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

    CGFloat offsetY = scrollView.contentOffset.y + __tableView.contentInset.top;

    CGFloat panTranslationY = [scrollView.panGestureRecognizer translationInView:self.tableView].y;

    if (offsetY > ) {

        if (panTranslationY > )

        {

            //下滑趋势，显示

            [self.navigationController setNavigationBarHidden:NO animated:YES];

        } else {

            //上滑趋势，隐藏

            [self.navigationController setNavigationBarHidden:YES animated:YES];

        }

    } else {

        [self.navigationController setNavigationBarHidden:NO animated:YES];

    }

}

这里的offsetY > 64只是为了在视图滑过navigationBar的高度之后才开始处理，防止影响展示效果。panTranslationY是scrollView的pan手势的手指位置的y值，可能不是太好，因为panTranslationY这个值在较小幅度上下滑动时，可能都为正或都为负，这就使得这一方式不太灵敏.

().当我们的手离开屏幕时候隐藏

- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset

{

    if(velocity.y > )

    {

        [self.navigationController setNavigationBarHidden:YES animated:YES];

    } else {

        [self.navigationController setNavigationBarHidden:NO animated:YES];

    }

}

velocity.y这个量，在上滑和下滑时，变化极小（小数），但是因为方向不同，有正负之分，这就很好处理了。

4.设置导航栏透明度

//第一种navigationBar根据滑动距离的渐变色实现

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

    CGFloat offsetToShow = 200.0;//滑动多少就完全显示

    CGFloat alpha =  - (offsetToShow - scrollView.contentOffset.y) / offsetToShow;

    [[self.navigationController.navigationBar subviews] objectAtIndex:].alpha = alpha;

}

//第二种

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

    CGFloat offsetToShow = 200.0;

    CGFloat alpha =  - (offsetToShow - scrollView.contentOffset.y) / offsetToShow;

    [self.navigationController.navigationBar setShadowImage:[UIImage new]];

    [self.navigationController.navigationBar setBackgroundImage:[self imageWithColor:[[UIColor orangeColor]colorWithAlphaComponent:alpha]] forBarMetrics:UIBarMetricsDefault];

}

//生成一张纯色的图片

- (UIImage *)imageWithColor:(UIColor *)color

{

    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);

    UIGraphicsBeginImageContext(rect.size);

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);

    CGContextFillRect(context, rect);

    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return theImage;

}

设置导航栏透明

//方法一:设置透明度

[[[self.navigationController.navigationBar subviews]objectAtIndex:] setAlpha:0.1];

//方法二:设置背景图片

/**

 * 设置导航栏,使其透明

 *

 */

- (void)setNavigationBarColor:(UIColor *)color targetController:(UIViewController *)targetViewController{

    //导航条的颜色 以及隐藏导航条的颜色targetViewController.navigationController.navigationBar.shadowImage = [[UIImage alloc]init];

    CGRect rect=CGRectMake(0.0f, 0.0f, 1.0f, 1.0f); UIGraphicsBeginImageContext(rect.size);

    CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [color CGColor]); CGContextFillRect(context, rect);

    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); [targetViewController.navigationController.navigationBar setBackgroundImage:theImage forBarMetrics:UIBarMetricsDefault];

}

//3

//设置一张空的图片

[self.navigationController.navigationBar setBackgroundImage:[[UIImage alloc]init] forBarMetrics:UIBarMetricsDefault];

//清除边框，设置一张空的图片(隐藏底部阴影条，传递一个空图片的UIImage对象),底部的黑线

[self.navigationController.navigationBar setShadowImage:[[UIImage alloc]init]];

//是否透明

self.navigationController.navigationBar.translucent = YES;

5.滑动返回手势

//关闭navigationController的滑动返回手势

//第一种

self.navigationController.interactivePopGestureRecognizer.enabled = NO;

//第二种

id target = self.navigationController.interactivePopGestureRecognizer.delegate;

UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:target action:nil];

[self.view addGestureRecognizer:pan];

//解决导航控制器pop手势失效

self.interactivePopGestureRecognizer.delegate = self;

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer

{

    // 手势何时有效 : 当导航控制器的子控制器个数 > 1就有效

    return self.childViewControllers.count > ;

}

6.导航栏的隐藏显示问题(正确的姿势)

.// 设置导航控制器的代理为self

self.navigationController.delegate = self;

.<UINavigationControllerDelegate>

.// 将要显示控制器

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

    // 判断要显示的控制器是否是自己

    BOOL isShowHomePage = [viewController isKindOfClass:[self class]];

    [self.navigationController setNavigationBarHidden:isShowHomePage animated:YES];

}

7.修改pop回来的页面

#warning  写在 C 的 viewDidLoad() 方法中

//A push 到 B, B push 到 C， C pop 到 D，D 再 pop到 A

// 建立可变拷贝对象，然后进行替换操作

NSMutableArray *navChildMArr = [self.navigationController.childViewControllers mutableCopy];

[navChildMArr replaceObjectAtIndex: withObject:D];

// 当然，最后再将替换后的数组赋值回去不要忘了

[self.navigationController setViewControllers:navChildMArr animated:YES];

自定义导航栏:https://github.com/zhangjie579/IWNavigationController

8.关于push,pop,model,dimiss

遍历popToViewController跳转的控制器，然后跳到指定位置

for (int i = ; i<self.navigationController.viewControllers.count; i++) {

    UIViewController * controller = self.navigationController.viewControllers[i];

    if ([controller isKindOfClass:InformMainViewController.class]) {

        InformMainViewController * vc = (InformMainViewController *)controller;

        [self.navigationController popToViewController:vc animated:YES];

        break;

    }

}

pop回指定控制器

. NSArray *viewControllers=[self.navigationController viewControllers];

. UIViewController *controller=[viewControllers objectAtIndex:];

. [self.navigationController popToViewController:controller animated:YES];

.关于push,pop,model,dimiss

   .注意：如果用stroyboard的话，要拉线，不然可能会出现不了界面！！！

[self performSegueWithIdentifier:@"MyApply-To-FlowDetail" sender:nil];

//跳转前传值

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    if ([segue.identifier isEqualToString:@"MyApply-To-FlowDetail"]) {

        FlowDetailController * controller = segue.destinationViewController;

        if (_bool_fromApply) {

            controller.flow_id = _flow_id;

        }

        else

        {

            controller.flow_id = _flowInfoModel.id;

        }

        controller.delegate = self;

    }

}

   .第二种方法

UIStoryboard *story = [UIStoryboard storyboardWithName:@"My" bundle:nil];

MyEnterCompanyNameController *vc = (MyEnterCompanyNameController *)[story instantiateViewControllerWithIdentifier:@"MyEnterCompanyName"];

[self.navigationController pushViewController:vc animated:YES];

.设置转场动画modalTransitionStyle

   .系统的

ForgetNameViewController *vc = [[ForgetNameViewController alloc] init];
    vc.vcType = ViewControllerTypeFindName;
//    [self.navigationController pushViewController:vc animated:YES];

    IWNavigationController *nav = [[IWNavigationController alloc] initWithRootViewController:vc];
    [IWNavigationController setupWithType:IWNavTypeWhite];

//nav.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;//以屏幕中间x为轴旋转
//nav.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;//直接进入页面，无动画效果
    nav.modalTransitionStyle = UIModalTransitionStylePartialCurl;//翻页

    [self presentViewController:nav animated:YES completion:nil];

.自定义的

　　　　1.创建个CATransition动画

　　　　2.将动画添加到self.view.window.layer，注意：千万别忘了window

　　　　3.presentViewController的时候，animated要设置为no

　　　　4.dissmiss的时候，animated也要设置为no，并且，也要添加对应的动画

CATransition *animation = [CATransition animation];
    [animation setDuration:0.5];
    [animation setType:kCATransitionPush];
    [animation setSubtype:kCATransitionFromRight];
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
    
    [self.view.window.layer addAnimation:animation forKey:@"LoginViewController"];                   //  添加动作
    
    ForgetNameViewController *vc = [[ForgetNameViewController alloc] init];
    vc.vcType = ViewControllerTypeFindName;
    
    IWNavigationController *nav = [[IWNavigationController alloc] initWithRootViewController:vc];
    [IWNavigationController setupWithType:IWNavTypeWhite];
    
    [self presentViewController:nav animated:NO completion:^{
        [self.view.window.layer removeAnimationForKey:@"LoginViewController"];
    }];

巴特西

ios UINavigationController 导航栏

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