我编写了一个简单的代码,它从News API获取特定数据并将其打印到控制台。
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let url = URL(string: "https://newsapi.org/v1/articles?source=bbc-news&sortBy=top&apiKey=af5f94cdf07e42ee877a3f2c2199d097")
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
if let articles = myJson["articles"] as? NSDictionary {
if let title = articles["title"] {
print(title)
}
}
}
catch {}
}
}
}
task.resume()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
然而,奇怪的是,这不会返回任何错误,也不会向控制台打印所需的“标题”。这是为什么?
答案 0 :(得分:1)
我猜问题是App Transport Security。
确保在plist文件中设置这些键。
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>