我得到了一个“ 如果没有更多的上下文,表达式的类型是不明确的”的这部分代码从一个项目,我试图升级到最新的斯威夫特版本。我好像想不通。我尝试了不同的方法,但不能让它工作。
问题在于这一行的语法
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 }
]
}
}