UINavigationBar透明

最近项目里面用到了UINavigationBar透明的问题

透明效果的实现只要几行很简单的代码

[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
self.navigationBar.shadowImage = [UIImage new];

但是我发现如果该页面是push进来的页面，并且pop回去之后就会出现UINavigationBar依旧为透明不能够变为原来的颜色，所以需要在重新设置其颜色

[self.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
self.navigationBar.shadowImage = nil;

此方法可以重写UINavigationController的类，然后所有的类都集成该类，代码如下

//
//  CustomNavigationController.m
//  SJFood
//
//  Created by 叶帆 on 14/11/25.
//  Copyright (c) 2014年 Ye Fan. All rights reserved.
//

#import "CustomNavigationController.h"
#import "HomeViewController.h"
#import "UserInfoViewController.h"
#import "IndividualViewController.h"

@interface CustomNavigationController ()

@end

@implementation CustomNavigationController

#pragma mark - UIViewController Methods
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.delegate = self;
}

-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    viewController.hidesBottomBarWhenPushed = YES;
    [super pushViewController:viewController animated:animated];
}

#pragma mark - UINavigationControllerDelegate methods
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if ([viewController isKindOfClass:[HomeViewController class]])
    {
        [self.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
        self.navigationBar.shadowImage = nil;
        self.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor whiteColor]};
        self.navigationBar.barTintColor = kMainProjColor;//导航条的颜色
        self.navigationBar.tintColor = [UIColor whiteColor];//左侧返回按钮，文字的颜色
        self.navigationBar.barStyle = UIStatusBarStyleLightContent;
    }

    else if([viewController isKindOfClass:[UserInfoViewController class]] || [viewController isKindOfClass:[IndividualViewController class]])
    {
        [self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
        self.navigationBar.shadowImage = [UIImage new];
        self.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor whiteColor]};
        self.navigationBar.tintColor = [UIColor whiteColor];//左侧返回按钮，文字的颜色
        self.navigationBar.barStyle = UIStatusBarStyleLightContent;
    }
    else
    {
        [self.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
        self.navigationBar.shadowImage = nil;
        self.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName: kMainBlackColor};
        self.navigationBar.barTintColor = [UIColor whiteColor];//导航条的颜色
        self.navigationBar.tintColor = kMainProjColor;//左侧返回按钮，文字的颜色
        self.navigationBar.barStyle = UIStatusBarStyleDefault;
    }
}

@end

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Ivan’s Blog by Ivan Ye is licensed under a Creative Commons BY-NC-ND 4.0 International License.
由叶帆创作并维护的叶帆的博客博客采用创作共用保留署名-非商业-禁止演绎4.0国际许可证。

本文首发于Ivan’s Blog | 叶帆的博客博客（ http://yeziahehe.com ），版权所有，侵权必究。

本文链接：http://yeziahehe.com/2015/07/29/UINavigationBar_translate/