具有EKEvents的PromiseKit-询问用户访问日历事件的许可

Question

New to PromiseKit so I want to try it with an async request to get the user's permission to retrieve calendar events. This simple example is just the beginning and will be chaining on from there, but I can't get the first part to work.

Here is the promise definition:

class func retrieveCalendarPermission() -> Promise<Bool> {
        return Promise {seal in
            EKEventStore().requestAccess(to: .event) {yes, no in
                seal.resolve(yes, no)
            }
        }
    }

and here it is implemented:

MyClass.retrieveCalendarPermission().done {yes in
            print("yes was called")
            }.catch {error in
                print ("no was called")
        }

I'm testing by denying the app permission to retrieve calendars - when I give permission, the code prints the correct "yes was called" but when I deny the app permission (to trigger the error ie user denied the app permission), I still get the "yes was called" and of course the errors in the console window which Apple throws regardless -but it's not caught by the 'no' part of the promise.

Any help is appreciated

Answer 1

因此，经过更多测试后，Promise无法按以下方式工作，因为如果用户拒绝或接受对日历的访问，则Promise会在“是”上返回true或false-两种情况下的错误均为零-