标签：
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
}
}
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原文地址：http://www.cnblogs.com/zuidap/p/5761633.html
