我有一个看起来像这样的Web服务
[
{
"id_test" : "1",
"title":"test1"
},
{
"id_test" : "2",
"title":"test2"
},{
"id_test" : "3",
"title":"test3"
},
]
我使用以下代码读取程序中的json:
func downloadJsonWithUrl()
{
let url = URL(string:"weserviceurl")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil
{
print("Error")
}
else
{
if let content = data
{
do
{
let myJson = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
print(myJson)
}
catch
{
}
}
}
}
task.resume()
}
我的问题是,目前在序列化下面使用此代码:
if let info = myJson as? NSArray
{
if let categories = info["title"]
{
print(categories)
}
}
不起作用。它返回空。为什么?
最佳答案
尝试这个
func downloadJsonWithUrl() {
let url = URL(string:"link")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil {
print("Error")
} else {
if let content = data {
do {
let myJson = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as! [AnyObject]
var categories: [String] = []
for item in myJson {
categories.append(item["title"] as! String)
}
print(categories)
} catch {
print(error)
}
}
}
}
task.resume()
}