如何在按钮上显示图像？ -迅速

Question

我正在以编程方式创建 UIButton ，并将标题，图片设置为以下代码。问题是每当我点击按钮时，图像会突出显示 ，但按钮的标题却没有。所以，我想创建两者或没有动画效果。我是否应该给出约束或什么使图像正确“SORT”？

Answer 1

我钉了它。我将按钮类型更改为“系统”按钮，颜色变为蓝色。然而，我设法通过将色调颜色设置为白色来将蓝色更改为白色，苹果默认使用该颜色将颜色设置为其控件（我猜）。因此系统按钮颜色为蓝色是由于tintcolor被指定为蓝色

的原因

let btnSort   = UIButton.buttonWithType(UIButtonType.System) as UIButton
btnSort.frame =  CGRectMake(2, 74, 140, 26)
btnSort.tintColor = UIColor.whiteColor()
btnSort.setImage(UIImage(named:"drop_arrow"), forState: UIControlState.Normal)
btnSort.imageEdgeInsets = UIEdgeInsets(top: 6,left: 100,bottom: 6,right: 14)
btnSort.titleEdgeInsets = UIEdgeInsets(top: 0,left: -30,bottom: 0,right: 34)
btnSort.setTitle("SORT", forState: UIControlState.Normal)
btnSort.layer.borderWidth = 1.0
btnSort.layer.borderColor = UIColor.whiteColor().CGColor
btnSort.addTarget(self, action: Selector("showSortTbl"), forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(btnSort)

Answer 2

以下是示例代码，您可以尝试一下。我以编程方式创建了一个按钮，并在EdgeInsets属性的帮助下分配了图像。

       let btnDemo : UIButton  = UIButton() 
        btnDemo.frame = CGRect(x: 5, y: 75, width: 65, height: 18)
        btnDemo.setImage(UIImage(named:"drop_arrow_sample"), forState: UIControlState.Normal)
        btnDemo.imageEdgeInsets = UIEdgeInsets(top: 6,left: 100,bottom: 6,right: 14)
        btnDemo.titleEdgeInsets = UIEdgeInsets(top: 0,left: -30,bottom: 0,right: 34)
        btnDemo.titleLabel?.font = UIFont(name: "Helvetica Neue", size: 13)
        btnDemo.layer.cornerRadius = 2.0
        btnDemo.titleLabel?.textColor = UIColor.whiteColor()
        btnDemo.backgroundColor = UIColor(red: 189/255, green: 176/255, blue: 0/255, alpha: 1)                      
        btnDemo.tag = index
        btnDemo.addTarget(self, action: "SortTable:", forControlEvents: UIControlEvents.TouchUpInside)