分割字符串
var a = "a, b, c, d, e, f"
let array = a.components(separatedBy:",")
最后结果:
array = ["a"," b"," c"," d"," e"," f"]
去掉空格
let newArray = []
for string in array {
let whitespace = NSCharacterSet.whitespaces
let str: String = string.trimmingCharacters(in: whitespace)
newArray.append(str)
}
最后结果:newArray = ["a",“b","c","d","e","f"]
字符串截取
三种方式: 1) subString(from:50)
2) substring(to:50)
3)substring(with:NSMakeRange(50, 8))