如何更改文本字段文本的首字母的颜色 [英] How to change the color of first letter of a textfields text

问题描述

我有一个文本框，文本框的文本的起始字母始终是一个美元符号.现在我需要更改美元符号的颜色，以便美元符号和其余文本应使用不同的颜色.我怎样才能做到这一点??任何想法

I have a textfield and starting letter of textfield's text is always a dollar sign.Now i need to change the color of dollar symbol so that dollar symbol and remaining text should be in different color. How can i do this?? Any idea

推荐答案

无法完成.UITextField中仅允许使用一种样式.

Can't be done standard. Only one style is allowed in a UITextField.

最好的主意:摆脱UITextField中的$，将其替换为空格，然后将UILabel放在顶部.

Best idea: get rid of the $ in the UITextField, replace it with whitespace, then place a UILabel on top.

第二个最好的主意:子类UITextField.

2nd best idea: subclass UITextField.

UITextField 有一个 drawTextInRect:方法，可能是您需要重写的所有方法.已记录

UITextField has a drawTextInRect: method which is probably all you need to override. Documented here. If you need more help, try googling or searching SO for how to subclass different UI classes, and get a feel for how to override draw methods (e.g. drawRect: for UIView)

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