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iosswiftuitextfieldios9

UITextField how to make the .text always displaying '$' sign while typing numbers on the right side?

I have a UITextField and I'm taking some input which are dollars in this care. I need to implement how to always be present the '$' sign after I'm typing the numbers (I mean the '$' to the right (not to the left) of my cursor because I will be writing the code for the Euro (€) sign as well). Any ideas?

Solution

  • You can use UITextField delegate or listen the notification, like UITextFieldTextDidChangeNotification.
    In these method, check the text and add '$'.

    Since '$' should be at the correct position, I suggest use UITextField property selectedTextRange to calculate the position, and After that use setSelectedTextRange to move the cursor to the correct place. 

    UITextPosition * tp = [self.passwordTextField positionFromPosition:self.passwordTextField.beginningOfDocument  offset:self.passwordTextField.text.length - @"$".length];
UITextRange *sr = [self.passwordTextField textRangeFromPosition:tp toPosition:tp];

    I think the sr is the selectedTextRange's value.