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Editorial Team
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Asked: 2026-05-30T14:18:16+00:00

I’m a noob in objective-c (from C#/Java background), and have difficulty understanding following objective-c

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I’m a noob in objective-c (from C#/Java background), and have difficulty understanding following objective-c syntax, which is used in Picker View control(and also other methods we need to implement for using Picker View):

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row 
             forComponent:(NSInteger)component

In order to understand, I tried to map it to the following syntax, but seems to be totally different.

-(NSString *)MethodName: (UIPickerView *)FirstParam and:(NSInteger)SecondParam 
             and:(NSInteger)ThirdParam

Could someone decompose the parts and give some explanation please?

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1 Answer

  1. Editorial Team

    It’s a method named

    pickerView:titleForRow:forComponent:

    It returns a pointer to a NSString, and requires parameters of types UIPickerView*, NSInteger, and NSInteger.

    A java-like method declaration might look like this:

    NSString pickerViewTitleForRowForComponent(UIPickerView pickerView, NSInteger row, NSInteger component)

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