@property setter for BOOL

Question

I'm having problems setting a BOOL using @property and @synthesize. I'm using @property BOOL isPaused; And I can get it by using [myObject isPaused]; but I cannot manage to set it. I'd like to use [myObject setPaused: NO];. I also tried @property (setter=setPaused) BOOL isPaused; but if I'm not mistaking, then I need to write that setter myself.

Solution

Why not use the dot notation?

myObject.isPaused = YES;
return myObject.isPaused;

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If your property is declared as @property BOOL isPaused, then the setter is always called as

[myObject setIsPaused:YES];

To rename the setter you must provide the full signature including the colons:

@property(setter=setPaused:) BOOL isPaused;
...
[myObject setPaused:YES];

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BTW, the naming convention is not to include verbs in a property.

@property(getter=isPaused) BOOL paused;

Comments

[George]

Thank you. I tried the dot notation before but I'm not a big fan of it. I also couldn't get it to work somehow? Anyway, I forgot the capital 'I' in setIsPaused... And I didn't know you needed the colon in the setter= attribute.

[JeremyP]

Actually, "isPaused" is the correct naming convention in this case. developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptu‌​al/…

[kennytm]

@Jeremy: -isPaused as a getter is fine, but I'm talking about the property name, like .playing (-isPlaying, -setPlaying:).

[JeremyP]

I'd say that naming convention applies to properties too because properties are really just accessors. The same considerations should apply.

[RK-]

+1 for Jeremy for sharing the official documentation link about naming conventions.

[Christian]

For adjectives, you leave off the "is" from the property name: developer.apple.com/library/mac/DOCUMENTATION/Cocoa/Conceptu‌​al/…