000 使用代码创建UI元素

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let label = UILabel(frame: CGRect(x: 50, y: 50, width: 200, height: 100))
      label.text = "Hello jikexueyuan"
      view.addSubview(label)

001.使用webView打开网站

需要在info.plist里设置

代码

@IBOutlet weak var wv: UIWebView!
@IBOutlet weak var urlInput: UITextField!
@IBAction func btnGoClicked(sender: AnyObject) {
    wv.loadRequest(NSURLRequest(URL:NSURL(string: urlInput.text!)!))
    urlInput.resignFirstResponder()
}

002.圆形进度指示器

ProgressControl.swift

import UIKit
class ProgressControl: UIView {
    override init(frame:CGRect){
        super.init(frame: frame)
        self.backgroundColor = UIColor(white: 1, alpha: 0)
    }
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    private var _progressValue:CGFloat = 0
    internal func getProgressValue()->CGFloat{
        return _progressValue
    }
    internal func setProgressValue(value:CGFloat){
        _progressValue = value
        setNeedsDisplay()
    }
    override func drawRect(rect: CGRect) {
        self.backgroundColor = UIColor(white: 1, alpha: 0)
        // Drawing code
        let ctx = UIGraphicsGetCurrentContext()
        let r = rect.width/2
        CGContextAddArc(ctx, r, r, r, 0, 3.141592653*2, 0)
        CGContextSetRGBFillColor(ctx, 0.7, 0.7, 0.7, 1)
        CGContextFillPath(ctx) 
        CGContextAddArc(ctx,r,r,r,0,3.141592653*2*_progressValue, 0)
        CGContextAddLineToPoint(ctx, r, r)
        CGContextSetRGBFillColor(ctx, 0, 0, 1, 1)
        CGContextFillPath(ctx)   
    }
}

viewController.swift

import UIKit
class ViewController: UIViewController {
    private var pc:ProgressControl!
    @IBAction func addProgressBtnPress(sender: AnyObject) {
        pc.setProgressValue(pc.getProgressValue()+0.1)
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        pc = ProgressControl(frame:CGRect(x: 100,
            y: 100,
            width: 100,
            height: 100))
        self.view.addSubview(pc)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

003.实时预览自定义控件

1.创建一个new Target

2.创建新的文件MyView.swift在这个target里

import UIKit
@IBDesignable class MyView: UIView {
    @IBInspectable var str:String = "Hello"
    @IBInspectable var borderWidth:CGFloat = 0{
        didSet{
        layer.borderWidth = borderWidth
        }
    }
    @IBInspectable var borderColor:UIColor = UIColor.clearColor(){
        didSet{
        layer.borderColor = borderColor.CGColor
        }
    }
    @IBInspectable var cornerRaius:CGFloat=0{
        didSet{
        layer.cornerRadius = cornerRaius
        }
    }
}

3.实时预览编辑效果

004. 传感器

import UIKit
import CoreMotion
class ViewController: UIViewController {
    var cmm:CMMotionManager!
    var q:NSOperationQueue!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    cmm = CMMotionManager()
        q = NSOperationQueue()
    }
    override func viewWillAppear(animated: Bool) {
        startAccelerometerUpdate()
        startGyroUpdate()
        startListenProximity()
        startListenLevel()
    }
    override func viewWillDisappear(animated: Bool) {
        stopAccelerometerUpdate()
        stopGyroUpdate()
        stopListenProximity()
        stopListenLevel()
    }
    //调用加速度传感器
    func startAccelerometerUpdate(){
        cmm.accelerometerUpdateInterval = 1
        if cmm.accelerometerAvailable && !cmm.accelerometerActive {
            cmm.startAccelerometerUpdatesToQueue(q, withHandler: {
                (data:CMAccelerometerData?,err:NSError?) -> Void in
                print("AccelerometerData:\(data)")
            })
        }else{
            print("加速度传感器不可用")
        }
    }
    //调用陀螺仪
    func startGyroUpdate(){
        cmm.gyroUpdateInterval = 1
        if cmm.gyroAvailable && !cmm.gyroActive{
            cmm.startGyroUpdatesToQueue(q, withHandler:{
                (data:CMGyroData?,err:NSError?)in
                print("Gyro data:\(data)")
            })
        }
    }
    //调用距离传感器
    func startListenProximity(){
        UIDevice.currentDevice().proximityMonitoringEnabled = true
        NSNotificationCenter.defaultCenter().addObserver(self,
            selector: Selector("proximityChanged"),
            name:UIDeviceProximityStateDidChangeNotification,
            object: nil)
    }
    func proximityChanged(){
        print("\(UIDevice.currentDevice().proximityState)")
    }
    //调用电源传感器
    func startListenLevel(){
    UIDevice.currentDevice().batteryMonitoringEnabled = true
        print("\(UIDevice.currentDevice().batteryLevel)")
        NSNotificationCenter.defaultCenter().addObserver(self,
            selector: ("levelChanged"),
            name: UIDeviceBatteryLevelDidChangeNotification,
            object: nil)
    }
    func levelChanged(){
    print("\(UIDevice.currentDevice().batteryLevel)")
    }
    func stopListenLevel(){
    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIDeviceBatteryLevelDidChangeNotification,object:nil)
    }
    func stopAccelerometerUpdate(){
        if cmm.accelerometerActive {
            cmm.stopAccelerometerUpdates()
        }
    }
    func stopGyroUpdate(){
        if cmm.gyroActive{
            cmm.stopGyroUpdates()
        }
    }
    func stopListenProximity(){
    NSNotificationCenter.defaultCenter().removeObserver(self,name:UIDeviceProximityStateDidChangeNotification,object:nil)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

005. 指南针

import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
      @IBOutlet weak var pointerIv: UIImageView!
    var lm:CLLocationManager!
    override func viewDidLoad() {
        super.viewDidLoad()
        lm = CLLocationManager()
        lm.delegate = self
    }
    override func viewWillAppear(animated: Bool) {
        lm.startUpdatingHeading()
    }
    func locationManager(manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) {
        pointerIv.transform = CGAffineTransformMakeRotation(CGFloat((180-newHeading.magneticHeading)/180.0 * 3.141592653))
    }
    override func viewWillDisappear(animated: Bool) {
        lm.stopUpdatingHeading()
    }
}

006.触摸事件的侦听 & 图片的缩小放大

import UIKit
class ViewController: UIViewController {
    @IBOutlet weak var iv:UIImageView!
    private var lastDistance:CGFloat = 0.0
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        //开启侦听多点触摸
        self.view.multipleTouchEnabled = true
    }
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        lastDistance = 0.0
        print("touchedBegan")
    }
    override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
        //输出触摸时某个点的坐标
        //print(touches.first!.locationInView(self.view))
        //输出有多少个触摸点同时在屏幕上
        // print(touches.count)
        //输出每一个触摸点的坐标
//        for touch in touches {
//        print(touch.locationInView(self.view))
//        }
        //图片的缩小放大
        let touchesSet = touches as NSSet
        if touchesSet.count == 2{
        let p1 = touchesSet.allObjects[0].locationInView(self.view)
        let p2 = touchesSet.allObjects[1].locationInView(self.view)
            let xx = p1.x - p2.x
            let yy = p1.y - p2.y
            let currentDistance = sqrt(xx * xx + yy * yy)
            if lastDistance == 0.0 {
            lastDistance = currentDistance
            }else{
                if lastDistance - currentDistance > 5{
                print("缩小")
                    lastDistance = currentDistance
                    iv.transform = CGAffineTransformScale(iv.transform, 0.9, 0.9)
                }else if lastDistance - currentDistance < -5{
                print("放大")
                    lastDistance = currentDistance
                    iv.transform = CGAffineTransformScale(iv.transform, 1.1, 1.1)
                }
            }
        }
    }
    override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
        print("touchedEnded")
    }
}

007.浏览器打开网页 - 打电话 - 发短信 - 发邮件

@IBAction func btnGoWeb(sender: AnyObject) {
    UIApplication.sharedApplication().openURL(NSURL(string:"http://www.google.com")!)
}
@IBAction func btnGoMail(sender: AnyObject) {
    UIApplication.sharedApplication().openURL(NSURL(string:"mailto://xxx@jikexueyuan.com")!)
}
@IBAction func btnGoPhone(sender: AnyObject) {
    UIApplication.sharedApplication().openURL(NSURL(string:"tel://10086")!)
}
@IBAction func btnGoMsg(sender: AnyObject) {
    UIApplication.sharedApplication().openURL(NSURL(string:"sms://10086")!)
}

app A调用app B

app A

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@IBAction func btnCallIme(sender: AnyObject) {
      UIApplication.sharedApplication().openURL(NSURL(string: "ime://i.love.you?h=Hello&b=World")!)
  }

app B

在info.plist里先注册

AppDelegate.swift

func application(application: UIApplication, handleOpenURL url: NSURL) -> Bool {
      let vc = LabelViewController(nibName:"LabelViewController",bundle:nil)
      window?.addSubview(vc.view)
      vc.myLabel.text = "\(url)"
      return true
  }

008.从相册获取照片

class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate {
    @IBOutlet weak var iv:UIImageView!
    @IBAction func btnGetImage(sender: AnyObject) {
        let c = UIImagePickerController()
        c.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        c.delegate = self
        self.presentViewController(c, animated:true,completion: nil)
    }
    func imagePickerController(picker: UIImagePickerController,didFinishPickingMediaWithInfo info: [String : AnyObject]) {
            let image:UIImage = info[UIImagePickerControllerOriginalImage] as! UIImage
            iv.image = image
            picker.dismissViewControllerAnimated(true, completion: nil)
    }