Swift - 常用代码片段

1 设置页面为横屏

// 设置页面为横屏
     UIDevice.currentDevice().setValue(UIInterfaceOrientation.LandscapeLeft.rawValue, forKey: "orientation")

// MARK:- 设置页面为横屏
    override func shouldAutorotate() -> Bool {
        return true
    }

2 隐藏状态栏

// MARK:- 隐藏状态栏
    override func prefersStatusBarHidden()->Bool {
        return true
    }

3 处理导航条显示消失

// MARK:- 处理导航条显示消失
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        self.navigationController!.setNavigationBarHidden(true, animated:false)
    }
    
    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationController!.setNavigationBarHidden(false, animated: false)
    }

4 setEdgesForExtendedLayout

在iOS 7中，苹果引入了一个新的属性，
叫做[UIViewController setEdgesForExtendedLayout:]，
它的默认值为UIRectEdgeAll。
当你的容器是navigation controller时，默认的布局将从navigation bar的顶部开始。
这就是为什么所有的UI元素都往上漂移了44pt。

func setEdgesForExtendedLayout() {
        if (self.respondsToSelector("setEdgesForExtendedLayout:")) {
            self.edgesForExtendedLayout = UIRectEdge.None
        }
    }

5 产生不重复的随机数

import Foundation


/**
 产生不重复的随机数
 
 使用
 var A = Random.number(5)
 print(A)   // [4, 2, 3, 5, 1]
 A = Random.number(5)
 print(A)   // [4, 5, 2, 1, 3]
 
 
 var Apro = Random.numberPro(10, end: 20)
 print(Apro)  // [20, 12, 17, 13, 16, 15, 14, 19, 11, 18]
 Apro = Random.numberPro(10, end: 20)
 print(Apro)  // [20, 17, 16, 18, 15, 14, 13, 11, 19, 12]

 
 */

struct Random {
    
    /**
     * 如区间表示 ==> [1, end]
     */
    static func number(end: Int) -> [Int] {
        var startArr = Array(1...end)
        var resultArr = Array(count: end, repeatedValue: 0)
        for i in 0.. (start, end]
     */
    static func numberPro(start: Int, end: Int) -> [Int] {
        let scope = end - start
        var startArr = Array(1...scope)
        var resultArr = Array(count: scope, repeatedValue: 0)
        for i in 0..

6 显示所有iPhone上的字体

import UIKit

class Helper {
    
    /**
     显示所有iPhone上的字体
     */    
    func showAllFonts() {
        let familyNames = UIFont.familyNames()
        for familyName in familyNames {
            print("family:\(familyName)")
            let fontNames = UIFont.fontNamesForFamilyName(familyName as String)
            for fontName in fontNames {
                print("font:\(fontName)")
            }
            print("-------------")
        }
    }
    
    
}

7 邮箱网址手机号码等正则判断

/**
 邮箱网址手机号码等正则判断
 
 使用
 - Validate.email("[email protected]").isRight    // false
 - Validate.URL("https://www.baidu.com").isRight // true
 - Validate.IP("192.168.0.107").isRight          // true
 
 */

import Foundation

enum Validate {
    case email(_: String)
    case phoneNum(_: String)
    case carNum(_: String)
    case username(_: String)
    case password(_: String)
    case nickname(_: String)
    
    case URL(_: String)
    case IP(_: String)
    
    
    var isRight: Bool {
        var predicateStr:String!
        var currObject:String!
        switch self {
        case let .email(str):
            predicateStr = "^([a-z0-9_\\.-]+)@([\\da-z\\.-]+)\\.([a-z\\.]{2,6})$"
            currObject = str
        case let .phoneNum(str):
            predicateStr = "^((13[0-9])|(15[^4,\\D]) |(17[0,0-9])|(18[0,0-9]))\\d{8}$"
            currObject = str
        case let .carNum(str):
            predicateStr = "^[A-Za-z]{1}[A-Za-z_0-9]{5}$"
            currObject = str
        case let .username(str):
            predicateStr = "^[A-Za-z0-9]{6,20}+$"
            currObject = str
        case let .password(str):
            predicateStr = "^[a-zA-Z0-9]{6,20}+$"
            currObject = str
        case let .nickname(str):
            predicateStr = "^[\\u4e00-\\u9fa5]{4,8}$"
            currObject = str
        case let .URL(str):
            predicateStr = "^(https?:\\/\\/)?([\\da-z\\.-]+)\\.([a-z\\.]{2,6})([\\/\\w \\.-]*)*\\/?$"
            currObject = str
        case let .IP(str):
            predicateStr = "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"
            currObject = str
        }
        
        let predicate =  NSPredicate(format: "SELF MATCHES %@" ,predicateStr)
        return predicate.evaluateWithObject(currObject)
    }
}