iOS自定义导航栏返回按钮，保留系统自带返回动画效果

自定义导航控制器返回按钮

在viewController的基类viewDidLoad中添加自定义返回按钮

UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 44, 44)];

[button setTitle:@"返回" forState:UIControlStateNormal];

[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

[button addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];

if (self.navigationController.childViewControllers.count > 1) {

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:button];

}

在viewWillAppear中设置系统手势动画的代理

if (self.navigationController.childViewControllers.count > 1) {

self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;

}

并实现代理方法（利用此方法禁用导航控制器跟控制器的返回手势）

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{

if (self.navigationController.childViewControllers.count > 1) {

return YES;

}

return NO;

}