自定义navbar
实习中遇到了一个问题，使用系统自带UINavigationController的时候，有些效果做不到。比如各个界面的navbar需要不同的颜色，pop的时候颜色切换很不自然
push后.png
pop时.png
这样的效果很不美观，而很多知名APP的切换是非常自然的，于是便去网上搜索解决办法
代码部分
自定义一个继承于UINavigationController的子类，添加如下方法（此方法可放在load方法里）
+ (void)setUpBase
{
UINavigationBar *bar = [UINavigationBar appearance];
bar.barTintColor = [UIColor redColor];
[bar setTintColor:[UIColor darkGrayColor]];
bar.translucent = YES;
[bar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[bar setShadowImage:[UIImage new]];
NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
// 设置导航栏字体颜色
UIColor * naiColor = SYJColor(100, 100, 100, 1);
attributes[NSForegroundColorAttributeName] = naiColor;
attributes[NSFontAttributeName] = [UIFont systemFontOfSize:18];;
bar.titleTextAttributes = attributes;
}
重写pushViewController方法
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (self.childViewControllers.count > 0) {
viewController.hidesBottomBarWhenPushed = YES;
// 就有滑动返回功能
self.interactivePopGestureRecognizer.delegate = nil;
//返回按钮自定义
UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
negativeSpacer.width = -15;
UIButton *button = [[UIButton alloc] init];
[button setImage:[UIImage imageNamed:@"返回"] forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:@"返回"] forState:UIControlStateHighlighted];
button.frame = CGRectMake(0, 0, 33, 33);
if (@available(ios 11.0,*)) {
button.contentEdgeInsets = UIEdgeInsetsMake(0, -15,0, 0);
button.imageEdgeInsets = UIEdgeInsetsMake(0, -10,0, 0);
}
[button addTarget:self action:@selector(backButtonTapClick) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:button];
viewController.navigationItem.leftBarButtonItems = @[negativeSpacer, backButton];
}
[super pushViewController:viewController animated:animated];
}
#pragma mark - 点击
- (void)backButtonTapClick {
[self popViewControllerAnimated:YES];
}
然后在你各个UIViewController中添加一个view
UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, ScreenWidth, NAVBAR_HEIGHT+STATUS_HEIGHT)];//NAVBAR_HEIGHT+STATUS_HEIGHT指navbar的高度和status的高度
view.backgroundColor=[UIColor redColor];//加上你要的颜色
[self.view addSubview:view];
效果
push后.png
pop时.png
