swift – Promise.onSuccess立即调用

发布时间：2020-12-14 04:59:47 所属栏目：百科来源：网络整理

导读：我正在使用 BrightFutures,当我运行以下代码时,在geoCoder completionHandler完成之前调用sequence().onComplete和sequence().onSuccess.你能帮助我吗？ self.uploadContentSequence = [FutureFutureVoid,NoError,NoError]();for post in posts { self.uploa

我正在使用 BrightFutures,当我运行以下代码时,在geoCoder completionHandler完成之前调用sequence().onComplete和sequence().onSuccess.你能帮助我吗？

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
}

解决方法

正如phimage在本期杂志中所指出的那样： https://github.com/Thomvis/BrightFutures/issues/111我将在未来完成未来.

（编辑：李大同）

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