Question

我有一个像这样的JSON字符串：

let stringArray = "[{\"url\":\"www.abc.com\",\"name\":\"benson\",\"age\":25},{\"url\":\"www.abc.com\",\"name\":\"tommy\",\"age\":23}]"

如何在此字符串中删除一个项目（例如，tommy）？

我尝试将其投放到[[NSObject: AnyObject]]，但总是失败。

if let dictArray = stringArray as? [[NSObject: AnyObject]] {


} else {

    println("failed") // print failed.
}

我如何得到这样的结果：

[{\"url\":\"www.abc.com\",\"name\":\"benson\",\"age\":25}]

Answer 1

首先将您的json字符串转换为swift数组或字典;

   let stringArray:String = "[{\"url\":\"www.abc.com\",\"name\":\"benson\",\"age\":25},{\"url\":\"www.abc.com\",\"name\":\"tommy\",\"age\":23}]"

    let data:NSData = stringArray.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!;

    let dict:NSArray = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: nil) as! NSArray;

    NSLog("dict \(dict)");

Answer 2

也许您可以将原始的jsons字符串转换为字典然后选择您需要的密钥。作为示例代码，如：

    if let json = NSJSONSerialization.JSONObjectWithData("your string to NSDATA",options:NSJSONReadingOptions.AllowFragments,$error){
   // checks the son type and make sure the operation perform to the NSDictionary
   var d = json as! NSDictionary;
   // Picks the the values your want from d
}

Answer 3

将字符串转换为数组，因为它的JSON字符串

    var stringArray = "[{\"url\":\"www.abc.com\",\"name\":\"benson\",\"age\":25},{\"url\":\"www.abc.com\",\"name\":\"tommy\",\"age\":23}]"

    var data : NSData = stringArray.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!
    var error: NSError?
    var array = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.allZeros, error: &error) as Array<AnyObject>
    println(array)

输出：

[{
    age = 25;
    name = benson;
    url = "www.abc.com";
}, {
    age = 23;
    name = tommy;
    url = "www.abc.com";
}]

现在执行删除操作

    array.removeAtIndex(1)
    println(array)

输出：

[{
    age = 25;
    name = benson;
    url = "www.abc.com";
}]

如何删除String Array中的项目？

3 个答案: