Change UITextField and UITextView Cursor / Caret Color

If you're targeting iOS 7+, this has been made much easier. Simply change the tintColor of the field with a cursor using the appearance proxy and it will apply throughout the app:

Swift 3.0:

UITextField.appearance().tintColor = .black 

Objective-C:

[[UITextField appearance] setTintColor:[UIColor blackColor]];

Same answer applies for an individual UITextField:

Swift 3.0:

myTextField.tintColor = .black 

Objective-C

[myTextField setTintColor:[UIColor blackColor]];

Swift 3:

  UITextField.appearance().tintColor = UIColor.black
  UITextView.appearance().tintColor = UIColor.black

yourTextField.tintColor = [UIColor whiteColor];

It works if you set it in code, 'cos somehow color trigger doesn't do it in the Interface Builder (Xcode 6.1.1). It suited well without a need to change any appearance proxy.

With iOS7 you can simply change tintColor of the textField