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我无法使用解析的JSON中的值。每当我尝试使用字典中的一个值时,它就会说它是可选的。它不会让我转换为int。任何帮助解开价值和转换为int将不胜感激。对不起,我的无知,我刚开始使用IOS和Swift。我用下面的key =“uso”显示我的麻烦。在Swift中展开问题
if let json = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? [[String : String]]{
for line in json{
//unwrap it with if let.
print(line)
let uso = String(line["uso"])
print(uso)
}
}
else {
let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("Error could not parse JSON: \(jsonStr)")
}
这是我的输出:
["capacidad": "15", "uso": "5", "unidad": "sanfrancisco", "telefono": "num"]
Optional("5")
["capacidad": "15", "uso": "5", "unidad": "pediatricouniversitario", "telefono": "num"]
Optional("5")
["capacidad": "15", "uso": "7", "unidad": "sanjorge", "telefono": "num"]
Optional("7")
["capacidad": "20", "uso": "4", "unidad": "himacaguas", "telefono": "num"]
Optional("4")
["capacidad": "20", "uso": "8", "unidad": "himabayamon", "telefono": "num"]
Optional("8")
["capacidad": "10", "uso": "8", "unidad": "sanlucas", "telefono": "num"]
Optional("8")
["capacidad": "15", "uso": "11", "unidad": "auxiliomutuo", "telefono": "num"]
Optional("11")