Six tips on the navigation bar and six tips on the navigation bar

Six tips on the navigation bar and six tips on the navigation bar

UINavigationBarAndUINavigationItemIs a common control in iOS development. Today I will introduce you to the six tips on the navigation bar.

1. Set the navigation bar title

Self. title = @ "iOS development: iOSDevTip ";

2. Set the navigation bar style

Setting method:

[self.navigationController.navigationBar setBarStyle:UIBarStyleBlack];

UIBarStyleStyle:

typedef NS_ENUM(NSInteger, UIBarStyle) {    UIBarStyleDefault          = 0,    UIBarStyleBlack            = 1,    UIBarStyleBlackOpaque      = 1, // Deprecated. Use UIBarStyleBlack    UIBarStyleBlackTranslucent = 2, // Deprecated. Use UIBarStyleBlack and set the translucent property to YES};

UIBarStyleDefaultIs the default style,UIBarStyleBlackIt is black and opaque.UIBarStyleBlackOpaqueAndUIBarStyleBlackTranslucentThe two are obsolete.

To set the transparent navigation bar, add the following code:

self.navigationController.navigationBar.translucent = YES;

3. Modify the return button title

self.navigationItem.title = @"test";

4. Hide the title of the return button

The stupid method is:

self.navigationItem.title = @"";

You can also set it as follows:

[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];

5. Set leftBarButtonItem

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStylePlain target:self action:@selector(back:)];- (void)back:(id)sender{    [self.navigationController popViewControllerAnimated:YES];}

6. What should I do if the returned gesture is invalid when I slide left?

If you setleftBarButtonItemAfter that, the left slide returns the gesture to become invalid. SetUIGestureRecognizerDelegateProxy:

self.navigationController.interactivePopGestureRecognizer.delegate = self;

The above are six tips on the navigation bar. For more iOS development-related technologies, please pay attention to my public account iOS development:IOSDevTip

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