swift 2 选择头像图片

一句话选择单个头像图片

新建ImagePickerViewController类：

/* let imagePicker = ImagePickerViewController()

imagePicker.delegate = self

self.presentViewController(imagePicker, animated: false, completion: nil)

*/

实现类代理方法

//MARK: -ImagePickerViewDelegate

extension FourViewController:ImagePickerViewDelegate{

func getImage(image: UIImage) {

headView?.headImage?.image = image

}

}

ImagePickerViewController类中实现代码

import UIKit

import AVFoundation

import MobileCoreServices

protocol ImagePickerViewDelegate {

func getImage(image:UIImage)

}

class ImagePickerViewController: UIViewController,UIActionSheetDelegate {

var delegate:ImagePickerViewDelegate?

var alertController:UIAlertController?

var pickCtr:UIImagePickerController?

init(){

super.init(nibName: nil, bundle: nil)

self.modalPresentationStyle = .OverFullScreen

self.view.backgroundColor = UIColor.clearColor()

pickCtr = UIImagePickerController()

pickCtr!.delegate = self;

pickCtr!.allowsEditing = true;

}

required init?(coder aDecoder: NSCoder) {

fatalError("init(coder:) has not been implemented")

}

override func viewDidAppear(animated: Bool) {

super.viewDidAppear(animated)

if (alertController == nil) {

alertController = UIAlertController(title: "选择文件源", message: nil, preferredStyle: .ActionSheet)

alertController?.addAction(UIAlertAction(title: "打开相机", style: .Default, handler: { (action) in

self.takePhoto()

}))

alertController?.addAction(UIAlertAction(title: "打开相册", style: .Default, handler: { (action) in

self.localPhoto()

}))

alertController?.addAction(UIAlertAction(title: "取消", style: .Default, handler: { (action) in

self.dismissViewControllerAnimated(false, completion: nil)

}))

self.presentViewController(alertController!, animated: true, completion: nil)

}

}

/// 打开相册

func localPhoto(){

if (self.isPhotoLibraryAvailable()){

pickCtr?.sourceType = UIImagePickerControllerSourceType.PhotoLibrary

self.presentViewController(pickCtr!, animated: true, completion: nil)

}else{

let alert = UIAlertController(title: nil, message: "相册不可用", preferredStyle: UIAlertControllerStyle.Alert)

alert.addAction(UIAlertAction(title: "确定", style: UIAlertActionStyle.Default, handler: { (action) in

self.dismissViewControllerAnimated(false, completion: nil)

}))

self.presentViewController(alert, animated: true, completion: nil)

}

}

/// 打开相机takePhoto

func takePhoto(){

let mediaType = AVMediaTypeVideo

let authStatus = AVCaptureDevice.authorizationStatusForMediaType(mediaType)

let you = self.isCameraAvailable()==true

let my = self.doesCameraSupportTakingPhotos()==true

pprintLog("you:\(you)")

pprintLog("my:\(my)")

pprintLog("myandyou:\(my&&you)")

if(authStatus == AVAuthorizationStatus.Restricted || authStatus == AVAuthorizationStatus.Denied){

let alert = UIAlertController(title: nil, message: "相机不可用，请到系统设置里更改", preferredStyle: UIAlertControllerStyle.Alert)

alert.addAction(UIAlertAction(title: "确定", style: UIAlertActionStyle.Default, handler: { (action) in

self.dismissViewControllerAnimated(false, completion: nil)

}))

self.presentViewController(alert, animated: true, completion: nil)

}else if(self.isCameraAvailable()==true && self.doesCameraSupportTakingPhotos()==true){

pickCtr!.sourceType = UIImagePickerControllerSourceType.Camera

self.presentViewController(pickCtr!, animated: true, completion: nil)

}else{

let alert = UIAlertController(title: nil, message: "相机不可用", preferredStyle: UIAlertControllerStyle.Alert)

alert.addAction(UIAlertAction(title: "确定", style: UIAlertActionStyle.Default, handler: { (action) in

self.dismissViewControllerAnimated(false, completion: nil)

}))

self.presentViewController(alert, animated: true, completion: nil)

}

}

override func viewDidLoad() {

super.viewDidLoad()

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

}

}

//MARK: - UIImagePickerControllerDelegate

extension ImagePickerViewController:UIImagePickerControllerDelegate,UINavigationControllerDelegate{

//取消

func imagePickerControllerDidCancel(picker: UIImagePickerController) {

pickCtr?.dismissViewControllerAnimated(true, completion: {

self.dismissViewControllerAnimated(false, completion: nil)

})

}

// 得到图片

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

let type:String = info[UIImagePickerControllerMediaType] as! String

if (type == kUTTypeImage as String){

let img:UIImage = info[UIImagePickerControllerEditedImage] as! UIImage

//对拍照后的照片进行处理

let image1 = self.fixOrientationIm(img)

//防止图片翻滚

let image2 = self.fixOrientationIm(image1)

//改变图片的size

let image3 = self.image(image2, targetSize: CGSizeMake(110, 80))

pickCtr?.dismissViewControllerAnimated(true, completion: {

self.dismissViewControllerAnimated(false, completion: {

self.delegate?.getImage(image3)

})

})

}

}

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

}

}

/// 判断手机是否支持。。相机....

extension ImagePickerViewController{

/// 判断设备是否有摄像头

func isCameraAvailable()->Bool{

return UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)

}

/// 后面的摄像头是否可用

func isRearCameraAvailable()->Bool{

return UIImagePickerController.isCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Rear)

}

/// 前面的摄像头是否可用

func isFrontCameraAvailable()->Bool{

return UIImagePickerController.isCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front)

}

/// 相册是否可用

func isPhotoLibraryAvailable()->Bool{

return UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary)

}

/// 相机是否可以取到图片

func doesCameraSupportTakingPhotos()->Bool{

return self.cameraSupportsMedia( kUTTypeImage as String, paramSourceType: UIImagePickerControllerSourceType.Camera)

}

/// 相机是否可以取到视频

func doesCameraSupportTakingVideos()->Bool{

return self.cameraSupportsMedia( kUTTypeMovie as String, paramSourceType: UIImagePickerControllerSourceType.Camera)

}

/// 相册是否可以取到视频

func canUserPickVideosFromPhotoLibrary()->Bool{

return self.cameraSupportsMedia(kUTTypeMovie as String, paramSourceType: UIImagePickerControllerSourceType.PhotoLibrary)

}

/// 相册是否可以取到图片

func canUserPickPhotosFromPhotoLibrary()->Bool{

return self.cameraSupportsMedia(kUTTypeImage as String, paramSourceType: UIImagePickerControllerSourceType.PhotoLibrary)

}

func cameraSupportsMedia(paramMediaType:String,paramSourceType:UIImagePickerControllerSourceType)->Bool{

var result = false

if paramMediaType.characters.count==0{

return false

}

let availableMediaTypes:NSArray? = UIImagePickerController.availableMediaTypesForSourceType(paramSourceType)

if availableMediaTypes != nil{

availableMediaTypes!.enumerateObjectsUsingBlock { (obj, idx,stop) in

let mediaType:String = obj as! String

if mediaType == paramMediaType{

result = true

//        stop = true;

}

}

}

return result;

}

}

//MARK: - 图片方法

extension ImagePickerViewController{

//MARK:- 相机照片处理

func fixOrientationIm(aImage:UIImage) -> UIImage{

// No-op if the orientation is already correct

if (aImage.imageOrientation == UIImageOrientation.Up){

return aImage

}

// We need to calculate the proper transformation to make the image upright.

// We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.

var transform  = CGAffineTransformIdentity

switch (aImage.imageOrientation) {

case UIImageOrientation.Down:

break

case UIImageOrientation.DownMirrored:

transform = CGAffineTransformTranslate(transform, aImage.size.width, aImage.size.height);

transform = CGAffineTransformRotate(transform, CGFloat(M_PI));

break

case UIImageOrientation.Left:

break

case UIImageOrientation.LeftMirrored:

transform = CGAffineTransformTranslate(transform, aImage.size.width, 0);

transform = CGAffineTransformRotate(transform, CGFloat(M_PI_2));

break

case UIImageOrientation.Right:

break

case UIImageOrientation.RightMirrored:

transform = CGAffineTransformTranslate(transform, 0, aImage.size.height);

transform = CGAffineTransformRotate(transform, -CGFloat(M_PI_2));

break

default:

break

}

switch (aImage.imageOrientation) {

case UIImageOrientation.UpMirrored:

break

case UIImageOrientation.DownMirrored:

transform = CGAffineTransformTranslate(transform, aImage.size.width, 0);

transform = CGAffineTransformScale(transform, -1, 1);

break

case UIImageOrientation.LeftMirrored:

break

case UIImageOrientation.RightMirrored:

transform = CGAffineTransformTranslate(transform, aImage.size.height, 0);

transform = CGAffineTransformScale(transform, -1, 1);

break

default:

break

}

// Now we draw the underlying CGImage into a new context, applying the transform

// calculated above.

let ctx:CGContextRef = CGBitmapContextCreate(nil, Int(aImage.size.width), Int(aImage.size.height), CGImageGetBitsPerComponent(aImage.CGImage!), 0, CGImageGetColorSpace(aImage.CGImage!)!, CGImageGetBitmapInfo(aImage.CGImage!).rawValue)!

CGContextConcatCTM(ctx, transform);

switch (aImage.imageOrientation) {

case UIImageOrientation.Left:

break

case UIImageOrientation.LeftMirrored:

break

case UIImageOrientation.Right:

break

case UIImageOrientation.RightMirrored:

// Grr...

CGContextDrawImage(ctx, CGRectMake(0,0,aImage.size.height,aImage.size.width), aImage.CGImage!);

break

default:

CGContextDrawImage(ctx, CGRectMake(0,0,aImage.size.width,aImage.size.height), aImage.CGImage!);

break

}

// And now we just create a new UIImage from the drawing context

let cgimg = CGBitmapContextCreateImage(ctx)

let img = UIImage(CGImage: cgimg!)

//        CGContextRelease(ctx)

//        CGImageRelease(cgimg)

return img;

}

/// 裁剪图片

func image(image:UIImage,targetSize:CGSize)-> UIImage{

UIGraphicsBeginImageContext(targetSize)

image.drawInRect(CGRectMake(0, 0, targetSize.width, targetSize.height))

let newImage = UIGraphicsGetImageFromCurrentImageContext()

UIGraphicsEndImageContext()

return newImage!

}

///得到图片

func getImageWithName(iName:String)->UIImage{

let cloudIcon = UIImage(contentsOfFile: self.cachedPicPath(iName))

return cloudIcon!

}

/// 存储图片

func saveImage(image:UIImage,name:String){

UIImagePNGRepresentation(image)?.writeToFile(name, atomically: true)

}

/// 获取图片路径

func cachedPicPath(imageN:String)->String{

let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentationDirectory, NSSearchPathDomainMask.UserDomainMask, true)

let documentsPath:NSString = paths.first! as NSString

let imageName = imageN+".png"

let path = documentsPath.stringByAppendingPathComponent(imageName)

return path

}

}