来自带有自定义图像的 UIButtons 的自定义 UIBarButtonItems - 是否可以使点击目标更大?

问题描述

我正在制作 UIBarButtons 如下:

I'm making UIBarButtons as follows:

// Create "back" UIBarButtonItem
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
backButton.frame = CGRectMake(0, 0, 28, 17);
[backButton addTarget:self action:@selector(backButtonTapped) forControlEvents:UIControlEventTouchUpInside];
backButton.showsTouchWhenHighlighted = YES;

UIImage *backButtonImage = [UIImage imageNamed:@"back-button.png"];
[backButton setBackgroundImage:backButtonImage forState:UIControlStateNormal];

UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

[toolBarItems addObject:backBarButtonItem];

但是，点击目标很小.更准确地说，它们是自定义图像的大小.(同样，它们很小.)有什么方法可以增加它们的点击目标的大小吗?

However, the tap targets are tiny. More precisely, they're the size of the custom images. (Which again, are tiny.) Is there any way to increase the size of their tap target?

(注意:改变 UIButtons 的 frame 属性只会拉伸图像.)

(Note: altering the frame property of the UIButtons just stretches the image.)

推荐答案

对您的代码稍作改动即可解决问题

Small changes to your code will do the stuff

需要更改:

• 我假设 backButtonImage 的大小为 {28,17} 并将按钮框架设置为 CGRectMake(0, 0, 48, 37) `
• 删除 backGroundImage 并使用 setImage:
• 将属性 imageEdgeInsets 设置为 UIEdgeInsetsMake(10, 10, 10, 10)

• I am assuming that the size of backButtonImage is {28,17} and setting the button frame as CGRectMake(0, 0, 48, 37) `
• remove the backGroundImage and use setImage:
• set the property imageEdgeInsets to UIEdgeInsetsMake(10, 10, 10, 10)

你的代码会变成这样:

UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
backButton.frame = CGRectMake(0, 0, 48, 37);
[backButton addTarget:self action:@selector(backButtonTapped) forControlEvents:UIControlEventTouchUpInside];
backButton.showsTouchWhenHighlighted = YES;

UIImage *backButtonImage = [UIImage imageNamed:@"back-button.png"];
[backButton setImage:backButtonImage forState:UIControlStateNormal];

backButton.imageEdgeInsets = UIEdgeInsetsMake(10, 10, 10, 10);

UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

[toolBarItems addObject:backBarButtonItem];

您可以根据需要更改 frame 和 imageEdgeInsets 的值.
这段代码对我有用.

You can change the value for the frame and the imageEdgeInsets as per your requirements.
This code worked for me.

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