使用带有两个参数的UIButton addTarget时无法识别的选择器

Question

When the method that I am trying to link to my UIButton only has one parameter, then I am able to call addTarget and my code runs successfully when the button is clicked --

[ myDetailButton addTarget:self action:@selector(hideMap:) forControlEvents:UIControlEventTouchUpInside];

(void)hideMap:(NSMutableArray*)arguments

but if I add a second parameter to my hideMap method, I get an unrecognized selector error when calling it:

[ myDetailButton addTarget:self action:@selector(hideMap:) forControlEvents:UIControlEventTouchUpInside];

(void)hideMap:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options

I see this error no matter how I format the addTarget parameters, per this question --

action:@selector(hideMap)
action:@selector(hideMap:)
action:@selector(hideMap:event:)

How can I call a method that has multiple parameters using addTarget?

Answer 1

You're problem is you are giving a selector that is expecting an NSMutableArray as the input along with a dictionary. the UIButton does not agree with this. As per your post you linked to, a UIBUtton only agrees to sending either nothing, itself as an id, or itself and an event.

I'm not 100% sure how you are expecting to get an NSMutableArray and an NSMutableDictionary from a UIButton callback, what is it exactly you are trying to achieve here, I might be able to suggest some help.

Answer 2

The issue is your method is:

-(void)hideMap:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options

And the method name is hideMap:withDict: not hideMap:event: .

Change this code action:@selector(hideMap:event:) to action:@selector(hideMap:withDict:) it'll resolve your issue.

There is no method like: hideMap:event: that is the issue.