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Editorial Team
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Asked: 2026-06-05T14:01:30+00:00

Inside my viewDidLoad I have the following. But I cannot seem to get the

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Inside my viewDidLoad I have the following. But I cannot seem to get the syntax right. 

[led.highlighted: [[NSUserDefaults standardUserDefaults] boolForKey:@"led"]];

and I also tried

[led.highlighted setValue:[[NSUserDefaults standardUserDefaults] boolForKey:@"led"]];

but that one errors with “Bad Receiver type ‘BOOL'”

My method that sets the value from an IBAction seems to be OK.

[[NSUserDefaults standardUserDefaults] setBool:led.isHighlighted forKey:@"led"];

So how exactly do I return the value of led.highlighted?

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1 Answer

  1. Editorial Team

    led.highlighted accesses the property; depending on it being on the right- or left-hand side of a statement, it uses the getter or the setter, respectively.

    led.highlighted = YES;
// Equivalent to: [led setHighlighted:YES];
BOOL thatLEDIsLitUp = led.highlighted;
// Equivalent to: BOOL thatLEDIsLitUp = [led highlighted];

    This assumes that you haven’t changed the getter and setter names to isHighlighted and setIsHighlighted:

    Given that, to set the property you can do either:

    led.highlighted = [[NSUserDefaults standardUserDefaults] boolForKey:@"led"];

    or

    [led setHighlighted:[[NSUserDefaults standardUserDefaults] boolForKey:@"led"]];

    Your first attempt, [led.highlighted:...] is just incorrect syntax. The second, [led.highlighted setValue:...] uses the accessor to get highlighted, which is a BOOL, and then tries to send a message to it. BOOLs aren’t objects, so you can’t send messages to them.

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