Question

试过这个但只适用于UIButton：

[btn setTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

Answer 1

直接设置UIBarButtonItem的target和action属性。

Answer 2

UIBarButtonItem没有相同的addTarget方法，所以你必须直接设置它们如下

btn.target = self;
btn.action = @selector(barButtonCustomPressed:);

...

// can specify UIBarButtonItem instead of id for this case
-(IBAction)barButtonCustomPressed:(UIBarButtonItem*)btn 
{
    NSLog(@"button tapped %@", btn.title);
}

Answer 3

我遇到了类似的问题...我认为你的意思是如果你的UIButton不是你的UITabBar的一部分来调用btnClicked然后它适当地工作。如果这是您提出的问题，请检查您的btnClicked方法并将其更改为：

-btnClicked:(id)sender

到

-(void) btnClicked:(id)sender

那，并在头文件中声明btnClicked ......

对于它的价值，这就是我在tabbarbuttonitem中设置按钮的方式：

UIBarButtonItem *exampleButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"button.png"] style:UIBarButtonItemStylePlain target:self action:@selector(btnClicked:)];

Answer 4

如果您在代码中需要足够的时间，那么继续前进并扩展我在Swift中完成的UIBarButtonItem是很好的。：）

import UIKit

extension UIBarButtonItem {
    func addTargetForAction(target: AnyObject, action: Selector) {
        self.target = target
        self.action = action
    }
}

例如，将自己设为UIViewController，您只需致电：

self.myBarButtonItem.addTargetForAction(self, action: #selector(buttonPressed(_:))

Answer 5

设置target

的action和UIBarButtonItem

Swift 5＆amp; 4

button.target = self button.action = #selector(action) @objc func action (sender:UIButton) { print("action") }

Answer 6

  UIBarButtonItem *barListBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAdd target:self action:@selector(getTruckStopListAction)];   
    self.navigationItem.rightBarButtonItem = barListBtn;
    [barListBtn release];

Answer 7

@ wp42今天确实有用。

在Objective-C中执行此操作的一种巧妙方法是向UIBarButtonItem类添加一个类别：

.h文件

#import <UIKit/UIKit.h>

@interface UIBarButtonItem (addons)

-(void)addTarget:(id)target andAction:(SEL)action;

@end

.m文件

#import "UIBarButtonItem+addons.h"

@implementation UIBarButtonItem (addons)

-(void)addTarget:(id)target andAction:(SEL)action{
   [self setTarget:target];
   [self setAction:action];
}

@end

在实践中：

[myBtn addTarget:self andAction:@selector(myFunction:)];

Answer 8

如果以编程方式添加UIBarButtonItem，设置目标和操作的最佳方法是使用以下方法之一初始化按钮：

UIBarButtonItem *customButton = [[UIBarButtonItem alloc] initWithImage:<#(UIImage)#> style:<#(UIBarButtonItemStyle)#> target:<#(id)#> action:<#(SEL)#>

UIBarButtonItem *customButton = [UIBarButtonItem alloc] initWithTitle:<#(NSString *)#> style:<#(UIBarButtonItemStyle)#> target:<#(id)#> action:<#(SEL)#>

UIBarButtonItem *customButton = [UIBarButtonItem alloc] initWithImage:<#(UIImage *)#> landscapeImagePhone:<#(UIImage *)#> style:<#(UIBarButtonItemStyle)#> target:<#(id)#> action:<#(SEL)#>

Answer 9

快捷键5：

提取为扩展程序：

extension UIBarButtonItem {

    static func nextBtn(target: AnyObject, action: Selector) -> UIBarButtonItem {
        let title = "Next"
        return button(title: title, target: target, action: action)
    }

    private static func button(title: String, target: AnyObject, action: Selector) -> UIBarButtonItem {
        return UIBarButtonItem(title: title, style: .done, target: target, action: action)
    }

}

输入代码：

navigationItem.rightBarButtonItem = .nextBtn(target: self, action: #selector(rightBarButtonAction))

操作：

@objc func rightBarButtonAction() {
    Swift.print("Button tapped!")
}

添加新按钮非常容易。

Answer 10

对于自定义视图：使用UITapGestureRecognizer并将isUserInteractionEnabled设置为true。

    profileImageView.isUserInteractionEnabled = true

    let tap = UITapGestureRecognizer(target: self, action: #selector(handleProfileImageTap))
    profileImageView.addGestureRecognizer(tap)

    navigationItem.leftBarButtonItem = UIBarButtonItem(customView: profileImageView)

Answer 11

您可能想尝试使用addTarget方法。

如何在运行时为UIBarButtonItem设置目标和操作

11 个答案: