Swift Json文件读取

写文主要为了记录读取json文件失败的问题及解决方案

问题特征：<The file couldn’t be opened>

读取Json文件

        guard let path = Bundle.main.path(forResource: "xx", ofType: "json") else {
            return
        }

        do {
            let url = URL(fileURLWithPath: path)        
            let data = try Data(contentsOf: url)
        } catch let e as Error? {
            print("\(e)")
        }

//        let doecode = try? JSONDecoder().decode([MODEL].self, from: data)

读取失败： The file “xxx.json” couldn’t be opened

解决方案：注意文件URL的初始化方法

正确：let url = URL(fileURLWithPath: path)
错误：let url = URL(string: path)     


完整错误信息：

** nil host used in call to allowsSpecificHTTPSCertificateForHost**

** nil host used in call to allowsAnyHTTPSCertificateForHost:**

** NSURLConnection finished with error - code -1002**

** CFURLCopyResourcePropertyForKey failed because it was passed a URL which has no scheme**

**Optional(Error Domain=NSCocoaErrorDomain Code=256 "The file “xxx.json” couldn’t be opened." UserInfo={NSURL=/xxxx.json})**