Question

Upputton以编程方式创建，在按下时不会改变颜色，就像使用Interface Builder创建的所有其他按钮一样。

我的按钮创建如下：

        let cableDetailsButton = UIButton(type: UIButtonType.System)
        cableDetailsButton.frame = CGRectMake(8, 8, 42, 21)
        cableDetailsButton.setTitle("Title", forState: UIControlState.Normal)
        cableDetailsButton.setTitleColor(self.view.tintColor, forState: .Normal)
        cableDetailsButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Highlighted)
        cableDetailsButton.addTarget(self, action: #selector(FuseDetailsViewController.cableButtonPressed), forControlEvents: .TouchUpInside)

我想补充一点，tintColor是默认的iOS颜色（蓝色）

我的目标是以编程方式创建相同的（默认！）按钮，因为从Interaface Builder中的列表中拖放一个按钮。我希望我的按钮在按下时改变颜色/ alpha。

我正在使用Swift 2.3

不幸的是，这个简单的任务让我不知所措，以至于我要求帮助。提前感谢您的帮助。

更新：按钮是UISCrollView的一部分

Answer 1

而不是

new_hash = hash1.map { |k, v| [k, v.to_i] }.to_h
new_hash == hash2 ? 1 : 0
=> 1

您需要将let cableDetailsButton = UIButton(type: UIButtonType.system)更改为UIButtonType

.custom

如果您正在使用Swift3，语法也是错误的。找到下面更正的语法

let cableDetailsButton = UIButton(type: UIButtonType.custom)

Answer 2

这对我有用。

    let cableDetailsButton = UIButton(type: .Custom)
    cableDetailsButton.frame = CGRect(x: 68, y: 68, width: 100, height: 70)
    cableDetailsButton.setTitle("Some button", forState: .Normal)
    cableDetailsButton.setTitleColor(self.view.tintColor, forState: .Normal)
    cableDetailsButton.setTitleColor(UIColor.blackColor(), forState: .Highlighted)
    view.addSubview(cableDetailsButton)

或者我并不完全明白你的问题是什么。

Answer 3

有两种方法可以突出显示按钮

方法1

   let cableDetailsButton = UIButton(type: UIButtonType.System)
    cableDetailsButton.frame = CGRectMake(20, 50, self.view.frame.size.width - 32, 50)
    cableDetailsButton.setTitle("Title", forState: UIControlState.Normal)
    cableDetailsButton.addTarget(self, action: #selector(cableButtonPressed(_:)), forControlEvents: UIControlEvents.TouchUpInside)
    cableDetailsButton.backgroundColor = UIColor.whiteColor()
    self.view.addSubview(cableDetailsButton)

    func cableButtonPressed(sender: UIButton){
        dispatch_async(dispatch_get_main_queue(), {

            if self.isHighLighted == false{
                sender.highlighted = true;
                self.isHighLighted = true
            }else{
                sender.highlighted = false;
                self.isHighLighted = false
            }
        });
    }

方法2

    let cableDetailsButton = UIButton(type: UIButtonType.System)
    cableDetailsButton.frame = CGRectMake(20, 50, self.view.frame.size.width - 32, 50)
    cableDetailsButton.setTitle("Title", forState: UIControlState.Normal)
    cableDetailsButton.setTitleColor(UIColor.greenColor(), forState: UIControlState.Normal)
    cableDetailsButton.setTitleColor(UIColor.orangeColor(), forState: UIControlState.Highlighted)
    cableDetailsButton.addTarget(self, action: #selector(cableButtonPressed(_:)), forControlEvents: UIControlEvents.TouchUpInside)
    self.view.addSubview(cableDetailsButton)


  func cableButtonPressed(sender: UIButton){
        if sender.selected {
            // set selected
            sender.selected = true
        } else {
            // set deselected
            sender.selected = false
        }

    }

Answer 4

在视图控制器中实现标记
```
var buttonSelected = false
```
保留按钮的代码，但删除一行

let cableDetailsButton = UIButton(type: UIButtonType.System) cableDetailsButton.frame = CGRectMake(8, 8, 42, 21) cableDetailsButton.setTitle("Title", forState: UIControlState.Normal) cableDetailsButton.setTitleColor(self.view.tintColor, forState: .Normal) cableDetailsButton.addTarget(self, action: #selector(FuseDetailsViewController.cableButtonPressed), forControlEvents: .TouchUpInside)
添加以下内容

func cableButtonPressed() { if buttonSelected { cableDetailsButton.setTitleColor(self.view.tintColor, forState: .Normal) buttonSelected = !buttonSelected //do whatever else you need to do }else { cableDetailsButton.setTitleColor(UIColor.blackColor(), forState: .Normal) buttonSelected = !buttonSelected //do whatever else you need to do } //do whatever else you need to do }

按下时，UIButton不会更改文本颜色

4 个答案: