Promise.onSuccess 立即致电

Question

我正在使用 BrightFutures，当我运行以下代码时，sequence().onComplete 和 sequence().onSuccess 在 geoCoder completionHandler 完成之前被调用。你能帮我弄到这个运行ning 吗？

self.uploadContentSequence = [Future<Future<Void, NoError>, NoError>]();

for post in posts {
     self.uploadContentSequence.append(future(self.preparePostUpload(post)))
}

self.uploadContentSequence.sequence().onComplete { (_) -> Void in
    print("onComplete")
}.onSuccess { (_) -> Void in
    print("onSuccess")
}.onFailure { (_) -> Void in
    print("onFailure")
}

[...]

func preparePostUpload(post: Post) -> Future<Void, NoError> {
    let promise = Promise<Void, NoError>()

    [...]

    let postLocation = CLLocation(latitude: Double(post.lat!), longitude: Double(post.lng!))
    let geocoder = CLGeocoder();
    let countryCode = NSLocale.currentLocale().objectForKey(NSLocaleCountryCode) as! String
    post.country = countryCode
    geocoder.reverseGeocodeLocation(postLocation, completionHandler: { (placemarks, locError) -> Void in
        [...]
        promise.success()
    });

    return promise.future
}

Answer 1

正如 phimage 在本期中指出的那样：https://github.com/Thomvis/BrightFutures/issues/111 我正在用一个完整的未来包装未来。

Promise.onSuccess 立即致电

Promise.onSuccess called immediately

swift

promise

future