2回答

• 

  丿心梦无痕

  2016-06-08 18:14:28

  //换行

  var str = "你好，playground"

  var stra = "你sss好，playground"

  var see = "\(str)\n\(stra)"

  print(see)

  
  

  //查找一个字符串在一个字符串中的位置范围

  var stringTest = "andy Wangpeng"

  stringTest.rangeOfString("Wangpeng")

  stringTest.rangeOfString("Wangpeng",options: NSStringCompareOptions.CaseInsensitiveSearch)

  stringTest.startIndex

  stringTest.endIndex

  
  

  //查找一个字符串在一个指定区域的位置范围（不常用）

  let startIndex:String.Index = stringTest.startIndex.advancedBy(3);

  let endIndex:String.Index = stringTest.endIndex.advancedBy(-3)

  let strRange = startIndex..<endIndex

  stringTest.rangeOfString("Wangpeng",options: NSStringCompareOptions.CaseInsensitiveSearch,range: strRange)

  
  

  //截取字符串

  stringTest.substringWithRange(strRange)

  
  

  //插入字符串

  stringTest.insert("!", atIndex: startIndex)

  
  

  //删除指定字符串

  stringTest.removeAtIndex(startIndex)

  stringTest

  //替换字符串

  stringTest.stringByReplacingCharactersInRange(strRange, withString: "Hello")

  
  

  //字符串可以用format了

  var aa = NSString(format: "sssss%d",22) as String

  
  

  let login = (true,"慕课女神")

  
  

  let(islog,_) = login

  
  

  //元组

  var ConnectState = (ResponseCode:404,_:"success",text:"connect to imooc");

  
  

  ConnectState.0

  
  

  0 0
• 

  default_null

  2015-05-14 15:59:08

  - - 照着屏幕打吧－ －

  0 0