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POUpdating label based on picker value the very first time a view is loaded
 

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    <p>I'm new to iPhone development, so my apologies if this is a ridiculous question.</p> <p>I'm following a sample from a book where it creates a exchange rate UIPicker and when you select one of the entries, it displays the conversion of US dollars into whatever currency is picked.</p> <p>I want the value to be updated in my label before I start changing the value from the picker.</p> <p>The very first time i enter my US dollar value in the textbox and I click on the "Return" button, i want the label to update and displays its equivalent value in whatever currency is currently selected in the picker.</p> <p>I have the correct code in the didSelectRow event, and that part works as long as i start spinning the picker's component wheels, so I thought I'd take that code and put it in a function which would have one parameter i.e. row and this function would then be called from didSelectRow where the row parameter would be passed and then I would:</p> <p>This is the code from the didSelectRow:</p> <pre><code>float rate = [[exchangeRates objectAtIndex:row] floatValue]; float dollars = [dollarText.text floatValue]; float result = dollars * rate; NSString *resultString = [[NSString alloc] initWithFormat:@"%.2f USD = %.2f %@", dollars, result, [countryNames objectAtIndex:row]]; resultLabel.text = resultString; [resultString release]; </code></pre> <p>Call this function when the "Did End on Exit" event for the textbox but my I'm having two problems:</p> <ol> <li><p>What is the correct way to write the function. Whatever way I write the function, I get various errors/warnings</p></li> <li><p>How do i get the currently select row of the picker, so that I can pass it to this function when the "Did End on Exit" event occurs when i click on the "Return" button.</p></li> </ol> <p>Thanks</p> <p>T.</p>
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