iOS 导航栏返回按钮时间action获取

UIViewController+BackButtonHandler.h

#import <UIKit/UIKit.h>

 

@protocol BackButtonHandlerProtocol <NSObject>

@optional

// Override this method in UIViewController derived class to handle 'Back' button click

-(BOOL)navigationShouldPopOnBackButton;

@end

 

@interface UIViewController (BackButtonHandler) <BackButtonHandlerProtocol>

 

@end

 

UIViewController+BackButtonHandler.m

#import "UIViewController+BackButtonHandler.h"

 

@implementation UIViewController (BackButtonHandler)

 

@end

 

@implementation UINavigationController (ShouldPopOnBackButton)

 

- (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item {

 

if([self.viewControllers count] < [navigationBar.items count]) {

return YES;

}

 

BOOL shouldPop = YES;

UIViewController* vc = [self topViewController];

if([vc respondsToSelector:@selector(navigationShouldPopOnBackButton)]) {

shouldPop = [vc navigationShouldPopOnBackButton];

}

 

if(shouldPop) {

dispatch_async(dispatch_get_main_queue(), ^{

[self popViewControllerAnimated:YES];

});

} else {

// Workaround for iOS7.1. Thanks to @boliva - http://stackoverflow.com/posts/comments/34452906

for(UIView *subview in [navigationBar subviews]) {

if(subview.alpha < 1.) {

[UIView animateWithDuration:.25 animations:^{

subview.alpha = 1.;

}];

}

}

}

 

return NO;

}

 

方法提

x x x.m

-(BOOL) navigationShouldPopOnBackButton ///在这个方法里写返回按钮的事件处理

 

{

    [self.navigationController popViewControllerAnimated:YES];

    

    return YES;

    

}

 

@end

 

转载于:https://www.cnblogs.com/aiwoqu/p/4708590.html