Swift 2.0 Syntax string

: Playground-noun:a place where people can play

Import UIKit

/*:

String

* The string in OC is an object , and the string in Swift is a struct

* The string in OC ends with a , and the string in Swift does not end in

* string in Swift has better performance than characters in OC

* strings in Swift support traversal

*/

Let str = "Abc\0def"

Print(str)

Traversing Strings

For C in str. Characters

{

Print (c)

}

Stitching Strings

var str2 = "Lnj"

str2 + = Str

str2

Formatting

Let name = "Lnj"

Let age =

target : name = LNJ, age =

Let res = ' name ' , age= \ (age) " /c11>

2015-01-03 14:05:06

Let res2 = String(format: "%d-%02d-%02d%02d:%02d:%02d", arguments: [ 1 , 3, 5, 6])

string Interception

Let str3 = "xmg520"

Tip : If you want to intercept strings in Swift , It's best to use the methods in nsstring

Good news : most data types in Swift support Direct conversion to data types in OC . For example, String --NSString

Let res4 = (str3 as nsstring). Substringwithrange(nsmakerange(0, 3))

Let STR4: nsstring = str3

Swift 2.0 Syntax string