QQ音乐如果长按返回按钮就会有如题的效果，实现起来很简单，直接替换掉系统的返回按钮就可以了
1.重写pushViewController方法
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
if (self.childViewControllers.count) { // 隐藏底部栏
viewController.hidesBottomBarWhenPushed = YES;
UIBarButtonItem *leftBtn = [UIBarButtonItem itemWithImageName:@"navback_black" target:self action:@selector(back) press:@selector(popToRootVC)];
viewController.navigationItem.leftBarButtonItem = leftBtn;
// 如果自定义返回按钮后, 滑动返回可能失效, 需要添加下面的代码
__weak typeof(viewController)Weakself = viewController;
self.interactivePopGestureRecognizer.delegate = (id)Weakself;
}
[super pushViewController:viewController animated:animated];
}
2.返回操作
//普通返回
- (void)back
{
// 判断两种情况: push 和 present
if ((self.presentedViewController || self.presentingViewController) && self.childViewControllers.count == 1) {
[self dismissViewControllerAnimated:YES completion:nil];
}else
[self popViewControllerAnimated:YES];
}
//长按返回顶层
- (void)popToRootVC{
[self popToRootViewControllerAnimated:YES];
}
3.创建可以点按和长按的UIBarButtonItem
+ (instancetype)itemWithImageName:(NSString *)imageName target:(id)target action:(SEL)action press:(SEL)press{
UIButton *button = [[UIButton alloc] init];
//设置不同状态的image
[button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:[NSString stringWithFormat:@"%@_highlighted",imageName]] forState:UIControlStateHighlighted];
//根据图片大小设置当前button的大小
button.size = button.currentImage.size;
//添加点击事件
[button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:target action:press];
longPress.minimumPressDuration = 0.8;
[button addGestureRecognizer:longPress];
return [[UIBarButtonItem alloc] initWithCustomView:button];
}
