UIButton 标题不显示 [英] UIButton title not displaying

问题描述

我刚开始用 Swift 进行开发.

I just started developing in Swift.

我动态创建了一个 UIButton 并将其添加到视图中.我的问题是视图没有显示按钮.

I created an UIButton dynamically and added it to the View. My issue is the view is not displaying the button.

我的代码:

var button:UIButton = UIButton();
button.frame = CGRect(x: 100, y: 250, width: 100, height: 50);
button.setTitle("Midhun", forState: UIControlState.Normal);
self.view.addSubview(button);

然后我将图像添加到按钮然后显示:

Then I added image to the button and then it is showing:

button.setImage(UIImage(named: "step_first.jpg"), forState: UIControlState.Normal);

我无法弄清楚发生了什么.请帮忙

I couldn't figure out what is happening. Please help

推荐答案

我确实发现了这个问题.

I actually figured out the issue.

在 Swift 中，UIButton 的标题是白色的.

In Swift the title of UIButton is white.

我更改了父视图的背景颜色，现在显示了.

I changed the background color of parent View, now it is showing.

self.view.backgroundColor = UIColor.black

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