ios 如何在 UIButton 中创建边框？
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How to create border in UIButton?
提问by iPhone
I use custom button in my app named "addButton" and I want to border it with white color how can i get the white color border around my custom button?
我在我的应用程序中使用名为“addButton”的自定义按钮，并且我想用白色将其边框化，我怎样才能在我的自定义按钮周围获得白色边框？
回答by bryanmac
You can set the border properties on the CALayer by accessing the layer property of the button.
您可以通过访问按钮的图层属性来设置 CALayer 上的边框属性。
First, add Quartz
首先，添加石英
#import <QuartzCore/QuartzCore.h>
Set properties:
设置属性：
myButton.layer.borderWidth = 2.0f;
myButton.layer.borderColor = [UIColor greenColor].CGColor;
See:
看：
https://developer.apple.com/documentation/quartzcore/calayer#//apple_ref/occ/cl/CALayer
https://developer.apple.com/documentation/quartzcore/calayer#//apple_ref/occ/cl/CALayer
The CALayer in the link above allows you to set other properties like corner radius, maskToBounds etc...
上面链接中的 CALayer 允许您设置其他属性，例如角半径、maskToBounds 等...
Also, a good article on button fun:
此外，还有一篇关于按钮乐趣的好文章：
https://web.archive.org/web/20161221132308/http://www.apptite.be/tutorial_custom_uibuttons.php
https://web.archive.org/web/20161221132308/http://www.apptite.be/tutorial_custom_uibuttons.php
回答by Ajeet Pratap Maurya
Its very simple, just add the quartzCore header in your file(for that you have to add the quartz framework to your project)
它非常简单，只需在您的文件中添加quartzCore 头文件（为此您必须将quartz 框架添加到您的项目中）
and then do this
然后这样做
[[button layer] setCornerRadius:8.0f];
[[button layer] setMasksToBounds:YES];
[[button layer] setBorderWidth:1.0f];
you can change the float values as required.
您可以根据需要更改浮点值。
enjoy.
请享用。
Here's some typical modern code ...
这是一些典型的现代代码......
self.buttonTag.layer.borderWidth = 1.0f;
self.buttonCancel.layer.borderWidth = 1.0f;
self.buttonTag.layer.borderColor = [UIColor blueColor].CGColor;
self.buttonCancel.layer.borderColor = [UIColor blueColor].CGColor;
self.buttonTag.layer.cornerRadius = 4.0f;
self.buttonCancel.layer.cornerRadius = 4.0f;
that's a similar look to segmented controls.
这与分段控件的外观相似。
UPDATE for Swift:
斯威夫特更新：
- No need to add "QuartzCore"
- 无需添加“QuartzCore”
Just do:
做就是了：
button.layer.cornerRadius = 8.0
button.layer.borderWidth = 1.0
button.layer.borderColor = UIColor.black.cgColor
回答by tong
And in swift, you don't need to import "QuartzCore/QuartzCore.h"
并且在 swift 中，您不需要导入“QuartzCore/QuartzCore.h”
Just use:
只需使用：
button.layer.borderWidth = 0.8
button.layer.borderColor = (UIColor( red: 0.5, green: 0.5, blue:0, alpha: 1.0 )).cgColor
or
或者
button.layer.borderWidth = 0.8
button.layer.borderColor = UIColor.grayColor().cgColor
回答by juanjo
The problem setting the layer's borderWidthand borderColoris that the when you touch the button the border doesn't animate the highlight effect.
问题设置图层的borderWidth和borderColor是，当你触摸按钮的边框没有设置动画的高光效果。
Of course, you can observe the button's events and change the border color accordingly but that feels unnecessary.
当然，您可以观察按钮的事件并相应地更改边框颜色，但这感觉没有必要。
Another option is to create a stretchable UIImage and setting it as the button's background image. You can create an Image set in your Images.xcassets like this:
另一种选择是创建一个可拉伸的 UIImage 并将其设置为按钮的背景图像。您可以在您的 Images.xcassets 中创建一个图像集，如下所示：
Then, you set it as the button's background image:
然后，将其设置为按钮的背景图像：
If your image is a template image you can set tint color of the button and the border will change:
如果您的图像是模板图像，您可以设置按钮的色调颜色，边框将发生变化：
Now the border will highlight with the rest of the button when touched.
现在，触摸时边框将与按钮的其余部分一起突出显示。
回答by Alex
To change button Radius, Color and Width I set like this:
要更改按钮半径、颜色和宽度，我设置如下：
self.myBtn.layer.cornerRadius = 10;
self.myBtn.layer.borderWidth = 1;
self.myBtn.layer.borderColor =[UIColor colorWithRed:189.0/255.0f green:189.0/255.0f blue:189.0/255.0f alpha:1.0].CGColor;
回答by LaloLoop
Here's an updated version (Swift 3.0.1) from Ben Packard's answer.
这是Ben Packard回答的更新版本 ( Swift 3.0.1) 。
import UIKit
@IBDesignable class BorderedButton: UIButton {
@IBInspectable var borderColor: UIColor? {
didSet {
if let bColor = borderColor {
self.layer.borderColor = bColor.cgColor
}
}
}
@IBInspectable var borderWidth: CGFloat = 0 {
didSet {
self.layer.borderWidth = borderWidth
}
}
override var isHighlighted: Bool {
didSet {
guard let currentBorderColor = borderColor else {
return
}
let fadedColor = currentBorderColor.withAlphaComponent(0.2).cgColor
if isHighlighted {
layer.borderColor = fadedColor
} else {
self.layer.borderColor = currentBorderColor.cgColor
let animation = CABasicAnimation(keyPath: "borderColor")
animation.fromValue = fadedColor
animation.toValue = currentBorderColor.cgColor
animation.duration = 0.4
self.layer.add(animation, forKey: "")
}
}
}
}
The resulting button can be used inside your StoryBoard thanks to the @IBDesignableand @IBInspectabletags.
由于@IBDesignable和@IBInspectable标签，生成的按钮可以在您的 StoryBoard 中使用。
Also the two properties defined, allow you to set the border width and color directly on interface builder and preview the result.
还定义了两个属性，允许您直接在界面构建器上设置边框宽度和颜色并预览结果。
Other properties could be added in a similar fashion, for border radius and highlight fading time.
可以以类似的方式添加其他属性，用于边框半径和高光衰落时间。
回答by BHUVANESH MOHANKUMAR
This can be achieved in various methods in Swift 3.0 Worked on Latest version August - 2017
这可以通过 Swift 3.0 中的各种方法实现 最新版本 2017 年 8 月
Option 1:
选项1：
Directly assign the borderWidth property values for UI Button:
直接为 UI Button 分配 borderWidth 属性值：
btnUserButtonName.layer.borderWidth = 1.0
Set Title with Default Color values for UI Button:
使用 UI 按钮的默认颜色值设置标题：
btnUserButtonName.setTitleColor(UIColor.darkGray, for: .normal)
Set Border with Default Color for the border property values for UI Button:
使用默认颜色为 UI 按钮的边框属性值设置边框：
btnUserButtonName.layer.borderColor = UIColor.red
Set user defined Color for the border property values for UI Button:
为 UI 按钮的边框属性值设置用户定义的颜色：
let myGrayColor = UIColor(red: 0.889415, green: 0.889436, blue:0.889424, alpha: 1.0 )
btnUserButtonName.layer.borderColor = myGrayColor.cgColor
Option 2: [Recommended]
选项 2：[推荐]
Use the Extension method, so the Button through out the application will be looking consistent and no need to repeat multiple lines of code every where.
使用 Extension 方法，因此整个应用程序中的 Button 将看起来一致，无需在任何地方重复多行代码。
//Create an extension class in any of the swift file
extension UIButton {
func setBordersSettings() {
let c1GreenColor = (UIColor(red: -0.108958, green: 0.714926, blue: 0.758113, alpha: 1.0))
self.layer.borderWidth = 1.0
self.layer.cornerRadius = 5.0
self.layer.borderColor = c1GreenColor.cgColor
self.setTitleColor(c1GreenColor, for: .normal)
self.layer.masksToBounds = true
}
}
Usage in code:
代码中的用法：
//use the method and call whever the border has to be applied
btnUserButtonName.setBordersSettings()
Output of Extension method Button:
扩展方法按钮的输出：
回答by Ben Packard
Here's a UIButtonsubclass that supports the highlighted state animation without using images. It also updates the border color when the view's tint mode changes.
这是一个UIButton支持高亮状态动画而不使用图像的子类。当视图的色调模式改变时，它也会更新边框颜色。
class BorderedButton: UIButton {
override init(frame: CGRect) {
super.init(frame: frame)
layer.borderColor = tintColor.CGColor
layer.borderWidth = 1
layer.cornerRadius = 5
contentEdgeInsets = UIEdgeInsets(top: 5, left: 10, bottom: 5, right: 10)
}
required init?(coder aDecoder: NSCoder) {
fatalError("NSCoding not supported")
}
override func tintColorDidChange() {
super.tintColorDidChange()
layer.borderColor = tintColor.CGColor
}
override var highlighted: Bool {
didSet {
let fadedColor = tintColor.colorWithAlphaComponent(0.2).CGColor
if highlighted {
layer.borderColor = fadedColor
} else {
layer.borderColor = tintColor.CGColor
let animation = CABasicAnimation(keyPath: "borderColor")
animation.fromValue = fadedColor
animation.toValue = tintColor.CGColor
animation.duration = 0.4
layer.addAnimation(animation, forKey: "")
}
}
}
}
Usage:
用法：
let button = BorderedButton(style: .System) //style .System is important
let button = BorderedButton(style: .System) //style .System is important
Appearance:
外貌：
回答by Vinay Jain
You don't need to import QuartzCore.hnow. Taking iOS 8 sdk and Xcode 6.1 in referrence.
您现在不需要导入QuartzCore.h。以 iOS 8 sdk 和 Xcode 6.1 为参考。
Directly use:
直接使用：
[[myButton layer] setBorderWidth:2.0f];
[[myButton layer] setBorderColor:[UIColor greenColor].CGColor];
回答by Raj Joshi
Update with Swift 3
使用 Swift 3 更新
button.layer.borderWidth = 0.8
button.layer.borderColor = UIColor.blue.cgColor
