Question

Could someone share some knowledge on whats best practice / code convention on using @property iVars in init methods or designated initializers?

please see my example:

@interface MyClass ()
@property(nonatomic,strong) nsstring *tempString;
@property(nonatomic,strong) NSMutableArray *arrItems;
@end

@implementation ViewController

- (id)init
{
    if (self = [super init]) {

        //Is this best practice / correct
        _tempString = @"";
        _arrItems = [[NSMutableArray alloc] initWithCapacity:0];
        ...
        ...

        //Or this
        self.tempString = @"";
        self.arrItems = [[NSMutableArray alloc] initWithCapacity:0];
    }
    return self;
}

@end

Any advice on why one or the other should be used?

Thanks…

Answer 1

Apple’s guidance on this topic is included in the aptly named section Don’t Use Accessor Methods in Initializer Methods and dealloc.