let emptyArray = String[]() 时会提示“Array types are now written with the brackets around the element type”错误，正确的写法应该是let emptyArray = [String]() 其他类型类似来处理就可以
Array types are now written with the brackets around the element type问题的解决方法
原文：http://www.cnblogs.com/tlnshuju/p/6937030.html