Password validation in UITextField in iOS

Question

I have 1 UITextfield for password in my iPhone application.

I want to validate this textfield with the following validation.

• Must be at le

Answer 1

Use the control:isValidObject: method of the NSTextFieldDelegate protocol which allows you to validate the value of a NSTextField. Assuming you have all your interface builder bits and pieces configured correctly, you might do something like this:

@interface PreferencesController : NSWindowController  {
    IBOutlet NSTextField *username, *password;
}

@end

@implementation PreferencesController

- (BOOL)control:(NSControl *)control isValidObject:(id)object
{
    if (control == password) {
      // Perform validation and return YES or NO
    }

    return YES;
}

@end