實(shí)在想不出怎么用一條語(yǔ)句既做到按字符串長(zhǎng)度排序又可以按照首字母順序兩個(gè)同時(shí)排序，所以干脆用試試用鏈?zhǔn)骄幊?，沒(méi)想到還真可以。。在swift2.0中寫的

var strArr=["d","cd","bcd","abcd","abc","ab","a"]

strArr.sort()

func compareTwoString(s1:String , s2:String)->Bool{

? ? return s1.characters.count<s2.characters.count //|| s1.characters.first<s2.characters.first

? ??

}

func compareTwoString2(s1:String , s2:String)->Bool{

? ? return s1.characters.first<s2.characters.first

? ??

}

strArr.sort(compareTwoString2).sort(compareTwoString)