我想将json数据保存到文件中而不进行存档。这样我就可以打开文件并检查是否一切正常
// valid json data
if NSJSONSerialization.isValidJSONObject(jsonData) {
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
let documentsDirectory = paths[0] as! String
let path = documentsDirectory.stringByAppendingPathComponent("test.json")
println(path) // if I open the file from finder, all the data is archived
// try 1: the jsonData is archived
if NSKeyedArchiver.archiveRootObject(jsonData, toFile: path) {
println("saved: true");
}
let stringTest = "asd"
stringTest.writeToFile(path, atomically: true, encoding: NSStringEncoding.allZeros, error: nil)
// the string is also archived
}
我也尝试
var jsonNSData = NSKeyedArchiver.archivedDataWithRootObject(jsonData)
var string = NSString(data: jsonNSData, encoding: NSUTF8StringEncoding)
println(string) // returns nil
最佳答案
您可以通过将JSON转换为NSDictionary,然后将其写入用户文档目录来实现:
var someJsonAsDict: [String: AnyObject] = ["foo": "string", "bar": NSNumber(integer: 5)]
if let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true) as? [String],
let documentsDirectory = paths.first
{
let filePath = documentsDirectory.stringByAppendingPathComponent("myPlistFile")
let fileManager = NSFileManager.defaultManager()
//IMPORTANT - someJsonAsDict cannot have primite types(they must be boxed in Appropriate NSNumber, NSValue, etc)
(someJsonAsDict as NSDictionary).writeToFile(filePath, atomically: true)
//print path of simulator so you can read it from terminal
println("target path is \(filePath)")
}
如果您碰巧将Array作为JSON的最外部对象,则只需替换:
someJsonAsDict as NSDictionary
使用适当的数组方法:
someJsonAsDict as NSArray
所有这些都将使用JSON创建plist文件。如果您碰巧需要原始json样式(如txt),则可以使用plutil(随Xcode命令行工具安装):
plutil -convert json myPlistFile.plist -o MyTxtFile.json
关于json - 您能否保存json数据而不进行存档,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/31532074/