ios uiimagepickercontroller 选择相册或者拍照上传

首先需要实现UIImagePickerControllerDelegate 代理 实现其imagePickerController 方法  这里用于选择图片或的拍照回调

//调用相机拍照 或者 图库选择
let picker = UIImagePickerController()
                picker.sourceType = .camera  //图库 .photoLibrary
                picker.delegate = self
                picker.allowsEditing = true  #开启图片编辑裁剪 会有正方形的选框显示
                UIApplication.shared.keyWindow?.rootViewController?.present(picker, animated: true, completion: nil)

//图片回调方法
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        // 获取选择的裁剪后的图片 fixOrientation 处理旋转不正常问题    并压缩到300*300
        let pickedImage = (info[UIImagePickerController.InfoKey.editedImage] as! UIImage).fixOrientation().scaleToSize(size: CGSize(width: 300, height: 300))
        // 是否支持相册
        if UIImagePickerController.isValidImagePickerType(type: UIImagePickerType.UIImagePickerTypePhotoLibrary) { // 相册
        } else if (UIImagePickerController.isValidImagePickerType(type: UIImagePickerType.UIImagePickerTypeCamera)){ // 相机
            // 图片保存到相册
            UIImageWriteToSavedPhotosAlbum(pickedImage, self, Selector(("imageSave:error:contextInfo:")), nil)
        }
        //这里是个回调结构体 在使用的地方实现这个结构体即可获取到处理好的图片
        if self.selectedImageBlock != nil {
            self.selectedImageBlock!(pickedImage)
        }
        picker.dismiss(animated: true) {
        }
    }

    //取消图片选择框
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true, completion: nil)
    }

　　相关定义的方法

extension UIImage {
 /// 修复图⽚旋转
 func fixOrientation() -> UIImage {
 if self.imageOrientation == .up {
 return self
 }
 var transform = CGAffineTransform.identity
 switch self.imageOrientation {
 case .down, .downMirrored:
 transform = transform.translatedBy(x: self.size.width, y: self.size.height)
 transform = transform.rotated(by: .pi)
 break
 case .left, .leftMirrored:
 transform = transform.translatedBy(x: self.size.width, y: 0)
 transform = transform.rotated(by: .pi / 2)
 break
 case .right, .rightMirrored:
 transform = transform.translatedBy(x: 0, y: self.size.height)
 transform = transform.rotated(by: -.pi / 2)
 break
 default:
 break
 }
 switch self.imageOrientation {
 case .upMirrored, .downMirrored:
 transform = transform.translatedBy(x: self.size.width, y: 0)
 transform = transform.scaledBy(x: -1, y: 1)
 break
 case .leftMirrored, .rightMirrored:
 transform = transform.translatedBy(x: self.size.height, y: 0);
 transform = transform.scaledBy(x: -1, y: 1)
 break
 default:
 break
 }
 let ctx = CGContext(data: nil, width: Int(self.size.width), height:
Int(self.size.height), bitsPerComponent: self.cgImage!.bitsPerComponent,
bytesPerRow: 0, space: self.cgImage!.colorSpace!, bitmapInfo:
self.cgImage!.bitmapInfo.rawValue)
 ctx?.concatenate(transform)
 switch self.imageOrientation {
 case .left, .leftMirrored, .right, .rightMirrored:
 ctx?.draw(self.cgImage!, in: CGRect(x: CGFloat(0), y: CGFloat(0), width:
CGFloat(size.height), height: CGFloat(size.width)))
 break
 default:
 ctx?.draw(self.cgImage!, in: CGRect(x: CGFloat(0), y: CGFloat(0), width:
CGFloat(size.width), height: CGFloat(size.height)))
 break
 }
 let cgimg: CGImage = (ctx?.makeImage())!
 let img = UIImage(cgImage: cgimg)
 return img
 }

 //将图⽚裁剪成指定⽐例（多余部分⾃动删除）
 func crop(ratio: CGFloat) -> UIImage {
 //计算最终尺⼨
 var newSize:CGSize!
 if size.width/size.height > ratio {
 newSize = CGSize(width: size.height * ratio, height: size.height)
 }else{
 newSize = CGSize(width: size.width, height: size.width / ratio)
 }

 ////图⽚绘制区域
 var rect = CGRect.zero
 rect.size.width = size.width
 rect.size.height = size.height
 rect.origin.x = (newSize.width - size.width ) / 2.0
 rect.origin.y = (newSize.height - size.height ) / 2.0

 //绘制并获取最终图⽚
 UIGraphicsBeginImageContext(newSize)
 draw(in: rect)
 let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
 UIGraphicsEndImageContext()
 return scaledImage!
 }

 //压缩图⽚宽⾼
 func scaleToSize(size:CGSize) -> UIImage{
 UIGraphicsBeginImageContext(size)
 self.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
 let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
 UIGraphicsEndImageContext()
 return scaledImage!
 }
}
// 相机相关扩展类⽅法
import UIKit
import Photos
/// 相⽚选择器类型：相册 PhotoLibrary，图库 SavedPhotosAlbum，相机Camera，前置摄像头 Front，后置摄像头 Rear
public enum UIImagePickerType:Int {
 /// 相册 PhotoLibrary
 case UIImagePickerTypePhotoLibrary = 1
 /// 图库 SavedPhotosAlbum
 case UIImagePickerTypeSavedPhotosAlbum = 2
 /// 相机 Camera
 case UIImagePickerTypeCamera = 3
 /// 前置摄像头 Front
 case UIImagePickerTypeCameraFront = 4
 /// 后置摄像头 Rear
 case UIImagePickerTypeCameraRear = 5
}
extension UIImagePickerController {
 // MARK: - 设备使⽤有效性判断
 // 相册 PhotoLibrary，图库 SavedPhotosAlbum，相机 Camera，前置摄像头Front，后置摄像头 Rear
 public class func isValidImagePickerType(type
imagePickerType:UIImagePickerType) -> Bool {
 switch imagePickerType {
 case .UIImagePickerTypePhotoLibrary:
 if self.isValidPhotoLibrary {
 return true
 }
 return false
 case .UIImagePickerTypeSavedPhotosAlbum:
 if self.isValidSavedPhotosAlbum {
 return true
 }
 return false
 case .UIImagePickerTypeCamera:
 if self.isValidCameraEnable && self.isValidCamera {
 return true
 }
 return false
 case .UIImagePickerTypeCameraFront:
 if self.isValidCameraEnable && self.isValidCameraFront {
 return true
 }
 return false
 case .UIImagePickerTypeCameraRear:
 if self.isValidCamera && self.isValidCameraRear {
 return true
 }
 return false
 }
 }

 /// 相机设备是否启⽤
 public class var isValidCameraEnable:Bool{
 get {
 let cameraStatus =
 AVCaptureDevice.authorizationStatus(for: AVMediaType.audio)
 if cameraStatus == AVAuthorizationStatus.denied {
 return false
 }
 return true
 }
 }

 /// 相机Camera是否可⽤（是否有摄像头）
 public class var isValidCamera:Bool{
 get {
 if
UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.Sourc
eType.camera){
 return true
 }
 return false
 }
 }

 /// 前置相机是否可⽤
 public class var isValidCameraFront:Bool{
 get {
 if
UIImagePickerController.isCameraDeviceAvailable(UIImagePickerController.Ca
meraDevice.front){
 return true
 }
 return false
 }
 }

 /// 后置相机是否可⽤
 public class var isValidCameraRear:Bool{
 get {
 if
UIImagePickerController.isCameraDeviceAvailable(UIImagePickerController.Ca
meraDevice.rear){
 return true
 }
 return false
 }
 }

 /// 相册PhotoLibrary是否可⽤
 public class var isValidPhotoLibrary:Bool{
 get {
 if
UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.Sourc
eType.photoLibrary) {
 return true
 }
 return false
 }
 }

 /// 图库SavedPhotosAlbum是否可⽤
 public class var isValidSavedPhotosAlbum:Bool {
 get {
 if
UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.Sourc
eType.savedPhotosAlbum) {
 return true
 }
 return false
 }
 }

 // MARK: - 属性设置
 func setImagePickerStyle(bgroundColor:UIColor?, titleColor:UIColor?,
buttonTitleColor:UIColor?) {
 // 改navigationBar背景⾊
 if let bgroundColor:UIColor = bgroundColor {
 self.navigationBar.barTintColor = bgroundColor
 }

 // 改navigationBar标题⾊
 if let titleColor:UIColor = titleColor {
 self.navigationBar.titleTextAttributes =
[NSAttributedString.Key.foregroundColor: titleColor]
 }

 // 改navigationBar的button字体⾊
 if let buttonTitleColor:UIColor = buttonTitleColor {
 self.navigationBar.tintColor = buttonTitleColor
 }
 }
}

　　

//拿到图片后我们使用ALamofire上传

//url 上传url地址
//image 需要上传的uiimage
//execute 回调函数
func upload(_ url:String,image:UIImage,execute:@escaping (Int,JSON) -> Void){
        let headers:HTTPHeaders = [
            "headerkey": "headerVal",
        ]
        //Alamofire.upload(image.jpegData(compressionQuality: 0.5)!, to: url)
        Alamofire.upload(multipartFormData: {(data) in
            data.append(image.jpegData(compressionQuality: 0.6)!, withName: "file",fileName: "\(Date().timeIntervalSince1970).jpg",mimeType: "image/jpeg")
        },to: url as URLConvertible,method: .post,headers: headers, encodingCompletion: {(result) in
            switch result{
            case .success(let upload,_,_):
                upload.responseJSON{response in
                    guard let result = response.result.value else { return }
                    print("json:\(result)")
                    let json = JSON(result)
                    execute(json["code"].intValue,,nil)
                }
                break
            case .failure(let err):
                print(err)
                execute(-1,nil)
                break
            }
            print(result)
        })
    }