如何更改 UIBarButtonItem 的选择区域？

Question

我正在尝试更改导航控制器中 UIBarButtonItem 的 selection 区域。基本上，我正在尝试更改使 UIBarButtonItem select 可用的允许区域。现在，我的 UIBarButtonItem 大小是 40x40，但我可以轻松地 select 即使我的手指根本没有碰到按钮。

这里是为了说明我的意思：

绿色代表UIBarButtonItem的大小。红色代表使 UIBarButtonItem select 可用的允许区域。

如何更改红色区域的宽度？

如果有帮助，这里有一段代码：

changeMuscleMap = UIButton(frame: CGRect(x: 0, y: 0, width: 40, height: 40) )
changeMuscleMap.setImage(UIImage(named: "change"), forState: .Normal)
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: changeMuscleMap)

谢谢！

Answer 1

可以通过制作 UIBarButtonItem 并将自定义项目设为 UIImageView 而不是 UIButton 来实现。试试下面的代码。我希望现在能解决这个问题。

changeMuscleMap = UIImageView(image:UIImage(named: "change"))
imageView.frame = CGRectMake(0, 0, 40, 40)
let leftBarBtn = UIBarButtonItem(customView: imageView)
self.navigationItem.leftBarButtonItem = leftBarBtn

Answer 2

我能够通过使用@Damien Romito 在此处提供的答案实现我想要的：

UINavigationBar UIBarButtonItems much larger click area than required

已针对 Swift 3.0 更新：

let buttonContainer: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 27, height: 30) )

let barButton: UIButton = UIButton(frame: CGRect(x: 0, y: 0, width: 30, height: 30) )

buttonContainer.addSubview(barButton)

barButton = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)

barButton(#imageLiteral(resourceName: "image"), for: UIControlState.normal)

self.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: buttonContainer)

barButton(self, action: #selector(ViewController.doSomething), for: UIControlEvents.touchUpInside)

Answer 3

您可以使用以下代码来增加或减少 UIBarButtonItem 按钮的宽度。

changeMuscleMap = UIButton(frame: CGRect(x: 0, y: 0, width: 120, height: 40) )
changeMuscleMap.setImage(UIImage(named: "change"), forState: .Normal)
changeMuscleMap.contentHorizontalAlignment = .left
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: changeMuscleMap)

Answer 4

如果你想要比要求更大的点击区域，试试下面的代码，然后制作一个带有自定义按钮的 UIBarButtonItem：

@implementation CustomButton

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent*)event
{
    UIEdgeInsets extendTouchInsets = UIEdgeInsetsMake(20, 0, 20, 0);
    CGRect bounds = self.bounds;
    bounds.origin.x -= extendTouchInsets.left;
    bounds.origin.y -= extendTouchInsets.top;
    bounds.size.width += extendTouchInsets.left + extendTouchInsets.right;
    bounds.size.height += extendTouchInsets.top + extendTouchInsets.bottom;
    return CGRectContainsPoint(bounds, point);
}

@end

如何更改 UIBarButtonItem 的选择区域？

How to change the selection area of a UIBarButtonItem?

uinavigationcontroller

uibarbuttonitem

ios

swift