我正在升级一个项目到最新的Swift版本,但在代码的这一部分中出现了“表达式类型不明确,需要更多上下文”的错误。我似乎无法解决它。我尝试了不同的方法,但是无法使它正常工作。
问题出在这一行的语法上。
let imageToDeleteParameters = imagesToDelete.map { ["id": $0.id, "url": $0.url.absoluteString, "_destroy": true] }
完整代码:
extension TutorialCreationRequest: WebserviceParametrable {
func toParameters() -> [String: AnyObject] {
let imageParameters = images.map { ["url": $0] }
let imageToDeleteParameters = imagesToDelete.map { ["id": $0.id, "url": $0.url.absoluteString, "_destroy": true] }
return [
"title": title,
"is_draft": isDraft,
"difficulty": difficulty,
"duration": duration,
"cost": cost,
"user_id": userId,
"description": description,
"to_sell": toSell,
"images": [imageParameters, imageToDeleteParameters].flatMap { $0 }
]
}
}