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Calling other methods from methods happen all the time in most programming languages. It's a great way to split code up and reuse code in different places without having to copy/paste. (This might be too basic for you. Sorry in that case) Things may be easier to understand if you use standard naming conventions too. ('likeThis' for variables and method names; 'LikeThis' for class names) <pre><code>- (void)textFieldDidEndEditing:(UITextField *)textField { NSString *oldTextFieldValue = textField.text; textField.text = [NSString stringWithFormat:@"%@ %%",oldTextFieldValue]; } </code></pre> <code>textField</code> here, is the pointer to the UITextField object which just finished editing. You want to pass this object to your new 'other' method. <pre><code>[self calculate:textField]; </code></pre> <code>self</code> is a pointer to an instance of the current class. For example, in a UIViewController subclass called 'MyViewController', self refers to the current instance of this class. Since the <code>-calculate</code> method is an instance method (beginning with a '-') it requires you to use <code>self</code>. The variable <code>textField</code> is passed after the colon. <pre><code>- (void)calculate: (UITextField*)textField { NSString *oldTextFieldValue = textField.text; textField.text = [NSString stringWithFormat:@"%@ %%",oldTextFieldValue]; </code></pre> } Use only the <code>IBAction</code> keyword when you want the method to be called from a UIComponent in an xib or storyboard.
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1. COAwesome, that really helped me, thanks for taking the time.
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2. COYou're welcome!
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