以编程方式快速更改UIButton的文本
问题描述：
这里简单的问题。我有一个UIButton，currencySelector，我想以编程方式更改文本。这就是我所拥有的：
Simple question here. I have a UIButton, currencySelector, and I want to programmatically change the text. Here's what I have:
currencySelector.text = "foobar"
Xcode给出了错误预期声明。我做错了什么，如何更改按钮的文本？
Xcode gives me the error "Expected Declaration". What am I doing wrong, and how can I make the button's text change?
答
在Swift 3中：
button.setTitle("Button Title",for: .normal)
否则：
button.setTitle("Button Title", forState: UIControlState.Normal)