ios - Swift:JSON 写入中的无效类型(UIImage)

Question

我正在尝试将 UIImage 转换为 base 64 字符串，以便可以将其保存到文件中然后上传。我正在做以下事情:

代码片段:

var writePath: String!
var params: NSMutableDictionary = ["file1": UIImageJPEGRepresentation(self.imageView1.image!, 1.0)!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0)), "userId" : user_id]

    do {
        let bodyJson = try NSJSONSerialization.dataWithJSONObject(params, options: .PrettyPrinted)
        let path: NSURL = NSURL(string: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])!
        writePath = path.URLByAppendingPathComponent("body.data").absoluteString
        try bodyJson.writeToFile(writePath, options: .AtomicWrite)
        writePath = String(format: "file://%@", writePath)
    } catch {
        print(error)
    }

但是，我收到无效类型错误。我必须使用后台 session ，还需要发送一些参数，所以，我正在使用这种方法。

已解决:其他原因导致了这个问题。

Answer 1

只是尝试解决，试试这个:

    var writePath: String!
    let params: [String: String] = ["file1": UIImageJPEGRepresentation(self.imageView1.image!, 1.0)!.base64EncodedStringWithOptions(.Encoding64CharacterLineLength), "userId" : user_id]

    do {
        let bodyJson = try NSJSONSerialization.dataWithJSONObject(params, options: .PrettyPrinted)
        let path: NSURL = NSURL(string: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])!
        writePath = path.URLByAppendingPathComponent("body.data").absoluteString
        try bodyJson.writeToFile(writePath, options: .AtomicWrite)
        writePath = String(format: "file://%@", writePath)
    } catch {
        print(error)
    }