一种简单的实现方法是扩展CollectionType。
使用可选的绑定和向下转换,然后序列化为数据,然后转换为字符串。
extension CollectionType where Generator.Element == [String:AnyObject] { func toJSonString(options: NSJSonWritingOptions = .PrettyPrinted) -> String { if let arr = self as? [[String:AnyObject]], let dat = try? NSJSONSerialization.dataWithJSonObject(arr, options: options), let str = String(data: dat, encoding: NSUTF8StringEncoding) { return str } return "[]" }}let arrayOfDictionaries: [[String:AnyObject]] = [ ["abc":123, "def": "ggg", "xyz": true], ["abc":456, "def": "hhh", "xyz": false]]print(arrayOfDictionaries.toJSonString())
输出:
[ { "abc" : 123, "def" : "ggg", "xyz" : true }, { "abc" : 456, "def" : "hhh", "xyz" : false }]
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