LeftBarbuttonItem左滑返回&UINavigationBar透明

一. 自定义了leftBarbuttonItem左滑返回手势失效了怎么办?

1. CustomViewController: UIViewController, UIGestureRecognizerDelegate

self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "back", style: .Plain, target: self, action: #selector(onBack))
self.navigationController?.interactivePopGestureRecognizer?.delegate = self

2. 使用FDFullscreenPopGesture 

Use cocoapods: pod 'FDFullscreenPopGesture' 

导入： import FDFullscreenPopGesture 就可以左滑返回

禁止返回：

　　To disable this pop gesture of a navigation controller:

　　navigationController.fd_fullscreenPopGestureRecognizer.enabled = NO;

　　To disable this pop gesture of a view controller:

　　viewController.fd_interactivePopDisabled = YES;

如果UINavigationController's -setNavigationBarHidden:animated: method, instead, use view controller's specific API to hide its bar:

- (void)viewDidLoad {
    [super viewDidLoad];
    self.fd_prefersNavigationBarHidden = NO;
}

 

二. 怎么把我的navigationbar弄成透明的而不是带模糊的效果？

1. 可以隐藏navigationbar

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    self.navigationController?.setNavigationBarHidden(true, animated: true)
}
    
override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    self.navigationController?.setNavigationBarHidden(false, animated: true)
}

2. 设置navigationBar图片

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    self.navigationController?.navigationBar.setBackgroundImage(UIImage(), forBarMetrics: .Default)
    self.navigationController?.navigationBar.shadowImage = UIImage()
}

override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    self.navigationController?.navigationBar.setBackgroundImage(nil, forBarMetrics: .Default)
    self.navigationController?.navigationBar.shadowImage = nil
}