How to set iOS UITextField border color? (RubyMotion + iOS)

问题

How to use RubyMotion to set a textField border color?

Example code:

textField = UITextField.alloc.init
textField.borderStyle = UITextBorderStyleLine

The border color shows up as the Apple default color; I want it to be red.

This is using RubyMotion, not Objective-C

回答1:

Use the Quartz framework.

In your Rakefile:

app.frameworks << 'QuartzCore'

To set the layer attributes:

textField.layer.borderColor = UIColor.redColor.CGColor
textField.layer.borderWidth = 1
textField.layer.masksToBounds = true

来源：https://stackoverflow.com/questions/25236117/how-to-set-ios-uitextfield-border-color-rubymotion-ios