user265961 user265961 - 3 months ago 16
Objective-C Question

Using `textField:shouldChangeCharactersInRange:`, how do I get the text including the current typed character?

I'm using the code below to try and have

textField2
's text content get updated to match
textField1
's whenever the user types in
textField1
.

- (BOOL) textField: (UITextField *)theTextField shouldChangeCharactersInRange: (NSRange)range replacementString: (NSString *)string {
if (theTextField == textField1){
[textField2 setText:[textField1 text]];
}
}


However, the output I observe is that...


textField2 is "12", when textField1 is "123"

textField2 is "123", when textField1 is "1234"


... when what I want is:


textField2 is "123", when textField1 is "123"

textField2 is "1234", when textField1 is "1234"


What am I doing wrong?

Answer

-shouldChangeCharactersInRange gets called before text field actually changes its text, that's why you're getting old text value. To get the text after update use:

[textField2 setText:[textField1.text stringByReplacingCharactersInRange:range withString:string]];
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