关于Swift的一点点总结
Welcome to Swift!!
print("Hello World!")
Swift与OC的区别(只适合新手看,因为我也是初出茅庐,不喜勿喷-.-!)
1.swif中输出函数print()会自动换行, 如果想取消换行,何以改成print("", terminator"")
2.swift中函数的格式为:
func 函数名(参数类型)->返回类型{
}
3.swift中的循环结构while{}, repeat{}while(), for index in a...b{}
swift中独有的方法(只写出了一部分)
1.两个字符串相加可以实现字符串拼接,数组也可以做加法如
arr3 = arr2 + arr1
将arr1元素全部添加到arr3中
2.元祖
相当于oc中的属性或者C中的结构体
let stu = (name:String, age:Int, height:Double)
通过元祖还可以实现2个数字值得交换(不需要第三变量)
(a, b) = (b, a)
注:swift中的运算符(+ - * / < >等等)都是一种函数, 并不是单纯地运算符!
3.swift中系统自带排序函数sort()注:括号中可以写参数若sort(>)就是从大到小排序
//冒泡法排序
var arr = [9, 7, 3, 12, 6, 7, 9, 35, 9, 1, 22, 3]
for i in 1.. arr[j+1]{
(arr[j], arr[j+1]) = (arr[j+1], arr[j])
iskong = false
}
}
if iskong{
break
}
}
print(arr)
下面再附上自己写的简单的小游戏的代码(非常low,可以家里有小孩的人士,供孩子娱乐-.-!)
//石头剪刀布小游戏
import UIKit
class ViewController: UIViewController {
var imageView:UIImageView!
var zhuangtai = 0
var computerNum = Int(arc4random_uniform(3)+1)
@IBAction func shitou(sender: AnyObject) {
zhuangtai = 2
Label3.text = ""
Label1.text = "已选择"
Label2.text = ""
}
@IBAction func bu(sender: AnyObject) {
zhuangtai = 3
Label3.text = "已选择"
Label1.text = ""
Label2.text = ""
}
@IBAction func jianzi(sender: AnyObject) {
zhuangtai = 1
Label3.text = ""
Label1.text = ""
Label2.text = "已选择"
}
@IBOutlet weak var Label1: UILabel!
@IBOutlet weak var Label2: UILabel!
@IBOutlet weak var Label3: UILabel!
@IBAction func beginButton(sender: AnyObject) {
print(computerNum)
//播放动画
imageView = UIImageView(frame: CGRectMake(0, 0, 150, 150))
imageView.animationImages = [
UIImage(named: "shitou")!,
UIImage(named: "jiandao")!,
UIImage(named: "bu")!
]
self.view.addSubview(imageView)
imageView.animationDuration = 0.5
imageView.startAnimating()
}
@IBAction func endButton(sender: AnyObject) {
imageView.stopAnimating()
//判断是否赢
if computerNum == Int(zhuangtai){
tanchu("平局")
}
else if computerNum == 1{
if zhuangtai == 2{
tanchu("你赢了")
}
else{
tanchu("你输了")
}
}
else if computerNum == 2{
if zhuangtai == 3{
tanchu("你赢了")
}
else{
tanchu("你输了")
}
}
else{
if zhuangtai == 1{
tanchu("你赢了")
}
else{
tanchu("你输了")
}
}
let imageStopView = UIImageView(frame: CGRectMake(0, 0, 150, 150))
//判断是哪张手势
if computerNum == 1{
imageStopView.image = UIImage(named: "jiandao")
self.view.addSubview(imageStopView)
}
else if computerNum == 2{
imageStopView.image = UIImage(named: "shitou")
self.view.addSubview(imageStopView)
}
else{
imageStopView.image = UIImage(named: "bu")
self.view.addSubview(imageStopView)
}
//动画停止在电脑随机出的结果 所对应的手势
computerNum = Int(arc4random_uniform(3)+1)
}
//调弹窗函数
func tanchu(str:String){
var strrr = ""
if computerNum == 1{
strrr = "剪刀"
}
else if computerNum == 2{
strrr = "石头"
}
else if computerNum == 3{
strrr = "布"
}
let alertC = UIAlertController(title: strrr, message: str, preferredStyle: .Alert)
let alertAction = UIAlertAction(title: "确定", style: .Default, handler: nil)
alertC.addAction(alertAction)
presentViewController(alertC, animated: true, completion: nil)
}
}
大家如果觉得小编写的对大家有帮助,请"喜欢"我吧-.-!