如何使用PromiseKit/Photos？

Question

我如何使用PromiseKit/Photos？我找不到任何有关照片的文档。

我已经实现了如下所示，并且我能够接收请求

_ = PHPhotoLibrary.requestAuthorization().then(execute: { (status) -> Void in print(status.rawValue) })

任何比上面的实现更好的实现都会很有帮助。

Answer 1

你走在正确的道路上，你实现的方式是正确的，你也可以检查下面的代码

http://promisekit.org/docs/

PHPhotoLibrary.requestAuthorization().then { authorized in
print(authorized)  // => true or false
}


PHPhotoLibrary.requestAuthorization().then { authorized -> Void in
guard authorized else { throw MyError.unauthorized }
// …
}.catch { error in
UIAlertView(/*…*/).show()
}

PHPhotoLibrary.requestAuthorization().then { authorized -> Promise in

guard authorized else { throw MyError.unauthorized }

// returning a promise in a `then` handler waits on that
// promise before continuing to the next handler
return CLLocationManager.promise()

// if the above promise fails, execution jumps to the catch below

}.then { location -> Void in

// if anything throws in this handler execution also jumps to the `catch`

}.catch { error in
switch error {
case MyError.unauthorized:
    //…
case is CLError:
    //…
}
}