我在try 解析iOS应用程序上的JSON时遇到此问题:
相关代码:
let jsonData:NSDictionary = try JSONSerialization.jsonObject(with: urlData! as Data, options: JSONSerialization.ReadingOptions.mutableContainers ) as! NSDictionary
/* XCode error ^^^ Errors thrown from here are not handled */
Could anybody help me ?
A possibly thrown error in let jsonData = try JSONSerialization ... is not handled.
您可以忽略一个可能的错误，并在发生错误时崩溃作为惩罚:
let jsonData = try! JSONSerialization ...
或者返回一个Optional，因此在错误情况下jsonData是nil:
let jsonData = try? JSONSerialization ...
or you can catch and handle the thrown error:
do {
let jsonData = try JSONSerialization ...
//all fine with jsonData here
} catch {
//handle error
print(error)
}
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