Question

I have a block property that looks like this:

@property (nonatomic, copy) void (^indexChangeBlock)(NSInteger index);

When I try to set the value for this property, Xcode autocomplete will omit the parameter name leaving me with something like this:

[self.segmentedControl3 setIndexChangeBlock:^(NSInteger) {
    code
}];

Then Xcode shows a Parameter name omitted error. I’m aware that I can solve this by adding the parameter name manually to make it look like this:

[self.segmentedControl3 setIndexChangeBlock:^(NSInteger index) {
    code
}];

My questions is, how can I make Xcode add the parameters names automatically. Or in other words, prevent it from removing them.

Answer 1

possible solution:

typedef void (^IndexChangeBlock)(NSInteger index);

and define your property with

@property (nonatomic, copy) IndexChangeBlock indexChangeBlock;

and if you add

- (void)setIndexChangeBlock:(IndexChangeBlock)indexChangeBlock;

everything should work