swift2.0 字符串，数组，字典学习代码

swift 2.0 改变了一些地方，让swift变得更加完善，这里是一些最基本的初学者的代码，里面涉及到swift学习的最基本的字符串，数组，字典和相关的操作。好了直接看代码吧。

class ViewController: UIViewController  {

    override func viewDidLoad() {

        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        addString()

        addArray()

        Arraytest()

        Dictorytest()

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.

    }

}

func setbutton( composedButton:UIButton )
{
    composedButton.frame = CGRectMake(100, 100, 100, 100)
    composedButton.backgroundColor=UIColor.redColor()

}

//======================  字符串============================
func addString ()
{
     //  字符串与字符的拼接
     let Z : Character = "B"
     let zx : String = "asdasdafdaf"
     let zxzx =  zx + String(Z)

     // 字符串与其他类型的拼接
     let a = 10
     let zzxzx = String(format: "%d %@", a ,zxzx)
     print(zzxzx)

     // 字符串的遍历
     for ch in zxzx.characters
     {
        print(ch)
     }

     // 获取制定处的字符串
     let c = zzxzx[zxzx.startIndex.advancedBy(3)]
     print("=============",c)

     // 指定位置处天际字符串
     var str = "zxczcbzbcjb"
     str.insert(c, atIndex: str.startIndex.advancedBy(4))
     print(str)

     // 计算字符串的长度
     let b = str.characters.count
     print(b)

     // 截取字符串 注意这里的 -3 或者截取到 -1 。这里的意思是。-3 就是从最后一位开始向前倒数三位  -1 就是从最后一位开始倒数1位
     let rang = Range<String.Index>(start: str.startIndex.advancedBy(2), end: str.endIndex.advancedBy(-3))
     let  m = str . substringWithRange(rang)
     print("---------------",m)

     // 字符串的替换
     var  String1 = "woxihuanni我喜欢你"
     String1 = String1.stringByReplacingOccurrencesOfString("我喜欢你", withString: "c", options: NSStringCompareOptions.CaseInsensitiveSearch, range: nil)
     String1 = String1.stringByReplacingOccurrencesOfString("c", withString: "我")
     print(String1)

     // 字符串类型的装换
     let y = "1000"
     let f = (y as NSString).integerValue;
     print(f/10)

     // 基本类型求余
     let j = 28.4
     print(j%0)//  nan 是非数

}

// ==============================  数组 ==============================
func addArray()
{

    var ZXArray:[String] = ["zhangxu" , "zhangxu1" ,"zahngxu2"]

    //  增加
    ZXArray.insert("cxc", atIndex: 2)

    //  删除
    ZXArray.removeAtIndex(2)

    //  数目
    print(ZXArray.count)

    //  遍历
    for zhangxu in  ZXArray
    {
      print(zhangxu)

    }
    print(ZXArray)

}

func Arraytest()
{

    var zarray :[[Int]] = [[1,2,3],[4,5,6],[7,8,9]]
    var xarray = [[Int]]()
    xarray=zarray;

    for var i = 0; i<3; i++
    {
        for var j=0 ; j<3; j++
        {
           print(zarray[i][j])
        }
    }

    for var i = 0; i<3; i++
    {
        for var j=0 ; j<3; j++
        {
           xarray[i][j]=0
        }
    }

    print(xarray)
    var zxcarray:[[Int]]
    zxcarray = []// 空数组
    zxcarray.insert(xarray[0], atIndex: 0)
    print(zxcarray)

}

//===============================  字典 ================================================
func Dictorytest()
{

    // 字典的声明和创建
    var dictest:[String:String]
    dictest=["123":"ren"]

    dictest.updateValue("zhangxu", forKey: "ren")
    print(dictest)
    print(dictest.isEmpty)

    var zdictest:[String:Int]=[:]
    print(zdictest.isEmpty)

    // 字典内容的增加
    zdictest.updateValue(1,forKey: "zhangxu2")
    print(zdictest.isEmpty)

    var zx  = zdictest["zhangxu2"]
    print(zx!)

    // 字典的遍历
    for(key,value) in dictest
    {
         print(key,value)
    }

    // 字典内容的删除
    dictest.removeValueForKey("123")
    print(dictest)

    // 修改字典里面 ren 这个KEY 对应的值
    dictest.updateValue("zhanxgu3", forKey: "ren")
    print(dictest)

}