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[英]How to fix: Type 'String' does not conform to protocol 'SequenceType' in Swift
[英]Type 'AnyObject' does not conform protocol 'sequenceType'
因此,這是我的代碼,在以下行中出現錯誤,提示“ Type'AnyObject'不符合協議'sequenceType'”:
for bar in allBars {
我嘗試了此處提出的解決方案( 類型“ AnyObject”不符合協議“ SequenceType” ),但它導致Xcode出現錯誤
我在IOS上很新,所以這可能是一些愚蠢的東西
func loadBars(){
let path = NSBundle.mainBundle().pathForResource("donnes", ofType: "json")
let filename: String = "donnees.json"
do{
let data = try NSData(contentsOfFile: path!, options: NSDataReadingOptions.DataReadingMapped)
do{
let bars: AnyObject? = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions())
if let bars = bars as? Dictionary<String, AnyObject> {
print(bars)
let allBars = bars["bars"]
for bar in allBars {
let nouveauBar = Bar(id: bar["id"], name: bar["name"], adress: bar["adress"], url: bar["url"], image_url: bar["image_url"], tags: bar["tags"], longitude: bar["longitude"], latitude: bar["latitude"])
bars += nouveauBar
}
} else {
print("Level file '\(filename)' is not valid JSON")
}
}catch {
print("Level file '\(filename)' is not valid JSON: \(error)")
}
}catch {
print("Could not load level file: \(filename), error: \(error)")
}
}
這是.json文件的開頭:
{
"code": 200,
"bars": [{
"id": 1627,
"address": "100 Rue Saint-Martin, 75004 Paris, France, Opera and Les Halles, Paris",
"name": "Caf\u00e9 Beaubourg",
"url": "/bar/paris/opera-and-les-halles/cafe-beaubourg",
"image_url": "https://prh-wbb-prod.s3.amazonaws.com/generic_640_480/WBB%20holding%20image3_54abcf7d218d1_55b8d2128eabb.jpg",
"tags": "Bar, Gay, Cafe, Dinner, Lunch",
"latitude": 48.860033826521,
"longitude": 2.3508920416641
}, {
"id": 1259,
"address": "19 Rue Beaubourg, 75004 Paris, France, Bastille and the Marais, Paris",
"name": "Georges",
"url": "/bar/paris/bastille-and-the-marais/georges",
"image_url": "https://prh-wbb-prod.s3.amazonaws.com/generic_640_480/WBB%20holding%20image4_54abcf6d1f68d_55b8d2015bb13.jpg",
"tags": "Serves Food, Great View, Rooftop, Terrace, Rock",
"latitude": 48.8603,
"longitude": 2.35097
}]
}
代替
if let bars = bars as? Dictionary<String, AnyObject> {
你可以寫
if let bars = bars as? [String: AnyObject],
let allBars = bars["bars"] as? [[String: AnyObject]] {
這已經為您提供了allBars
數組。 然后,編譯器知道allBars
中的每個bar
將具有[String: AnyObject]
類型( Dictionary<String, AnyObject>
),該類型允許您將bar
用作字典。 您仍然必須解開id
和name
類的屬性,您可以執行與上述代碼類似的操作。
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