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[已解决]swift中创建图像在上面文字在下面的按钮

iOS crifan 1342浏览 0评论

ios中,想要弄个button,图片在上面,文字在下面

打算自己实现自定义的UIButton

但是觉得有点麻烦

想要去看看,能否很方便的用iOS自带的UIButton实现类似的效果

swift button image up title bottom

iphone – Label under image in UIButton – Stack Overflow

iphone – UIButton: how to center an image and a text using imageEdgeInsets and titleEdgeInsets? – Stack Overflow

看到个:

titleEdgeInsets

和:

imageEdgeInsets

iphone – UIButton Image + Text IOS – Stack Overflow

UIButton-ImageAndTitlePositioning/ButtonWithImageAndTitleExtension.swift at master · mervynokm/UIButton-ImageAndTitlePositioning

Pretty UIButtons (in Swift) – Grok Swift

Swift – 自由调整图标按钮中的图标和文字位置(扩展UIButton)

Positioning label under the image in UIButton. | lines of code

用:

<code>extension UIButton {

    //    This method sets an image and title for a UIButton and
    //    repositions the titlePosition with respect to the button image.
    //    Add additionalSpacing between the button image &amp; title as required
    //    For titlePosition, the function only respects UIViewContentModeTop, UIViewContentModeBottom, UIViewContentModeLeft and UIViewContentModeRight
    //    All other titlePositions are ignored
    func set(image anImage: UIImage?, title: String!, titlePosition: UIViewContentMode, additionalSpacing: CGFloat, state: UIControlState){
        self.imageView?.contentMode = .Center
        self.setImage(anImage, forState: state)

        positionLabelRespectToImage(title, position: titlePosition, spacing: additionalSpacing)

        self.titleLabel?.contentMode = .Center
        self.setTitle(title, forState: state)
    }

    private func positionLabelRespectToImage(title: NSString, position: UIViewContentMode, spacing: CGFloat) {
        let imageSize = self.imageRectForContentRect(self.frame)
        let titleFont = self.titleLabel?.font!
        let titleSize = title.sizeWithAttributes([NSFontAttributeName: titleFont!])

        var titleInsets: UIEdgeInsets
        var imageInsets: UIEdgeInsets

        switch (position){
        case .Top:
            titleInsets = UIEdgeInsets(top: -(imageSize.height + titleSize.height + spacing), left: -(imageSize.width), bottom: 0, right: 0)
            imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -titleSize.width)
        case .Bottom:
            titleInsets = UIEdgeInsets(top: (imageSize.height + titleSize.height + spacing), left: -(imageSize.width), bottom: 0, right: 0)
            imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -titleSize.width)
        case .Left:
            titleInsets = UIEdgeInsets(top: 0, left: -(imageSize.width * 2), bottom: 0, right: 0)
            imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -(titleSize.width * 2 + spacing))
        case .Right:
            titleInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -spacing)
            imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
        default:
            titleInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
            imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
        }

        self.titleEdgeInsets = titleInsets
        self.imageEdgeInsets = imageInsets
    }
}

       let NewButtonWidth:CGFloat = screenWidth/3

        //2.1 new customer
        let newCustomerButton:UIButton = UIButton()
        newCustomerButton.center = CGPointMake(NewButtonWidth/2, HomeNewHeight/2)
        newCustomerButton.titleLabel?.font = UIFont.boldSystemFontOfSize(14)
        newCustomerButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
        newCustomerButton.set(image: UIImage(named: "new_customer"), title: "新增客户", titlePosition: .Bottom,
                 additionalSpacing: 10.0, state: .Normal)
        self.newView.addSubview(newCustomerButton)
        constrain(newCustomerButton) {newCustomerButton in
            newCustomerButton.top == newCustomerButton.superview!.top
            newCustomerButton.left == newCustomerButton.superview!.left
            newCustomerButton.width == NewButtonWidth
            newCustomerButton.bottom == newCustomerButton.superview!.bottom
            newCustomerButton.centerY == newCustomerButton.superview!.centerY
        }
</code>

效果还是不好:

算了,还是自己去实现吧

【总结】

最后用代码:

<code>import UIKit
import Cartography

class CreateNewButton: UIButton {
    var newImageView:UIImageView
    var newLabel:UILabel

    init(newImage:UIImage, newTitle:String) {
        self.newImageView = UIImageView()
        self.newLabel = UILabel()

        super.init(frame: CGRectZero)

        self.addSubview(self.newImageView)
        self.newImageView.image = newImage
        constrain(newImageView) {newImageView in
            newImageView.top == newImageView.superview!.top + 12
            newImageView.height == self.newImageView.image!.size.height
            newImageView.centerX == newImageView.superview!.centerX
            newImageView.width &lt;= newImageView.superview!.width
        }

        //for debug
//        self.newImageView.backgroundColor = UIColor.yellowColor()

        self.addSubview(self.newLabel)
        self.newLabel.text = newTitle
        self.newLabel.textAlignment = .Center
        self.newLabel.font = UIFont.systemFontOfSize(11)
        constrain(newLabel, newImageView) {newLabel, newImageView in
            newLabel.top == newImageView.bottom + 10
            newLabel.height == 16
            newLabel.width &lt;= newLabel.superview!.width
            newLabel.centerX == newLabel.superview!.centerX
        }

        //for debug
//        self.newLabel.backgroundColor = UIColor.cyanColor()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

        let NewButtonWidth:CGFloat = screenWidth/3

        //2.1 new customer
        let newCustomerButton:UIButton = CreateNewButton(newImage: UIImage(named: "new_customer")!, newTitle: "新增客户")
        self.newView.addSubview(newCustomerButton)
        constrain(newCustomerButton) {newCustomerButton in
            newCustomerButton.top == newCustomerButton.superview!.top
            newCustomerButton.left == newCustomerButton.superview!.left
            newCustomerButton.width == NewButtonWidth
            newCustomerButton.bottom == newCustomerButton.superview!.bottom
            //newCustomerButton.centerY == newCustomerButton.superview!.centerY
        }
</code>

效果:

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