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( 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, 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),
CGFloat(size.height), height: CGFloat(size.width)))
break
default:
ctx?.draw(self.cgImage!, in: CGRect(x: CGFloat(0), y: CGFloat(0),
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( size.height * ratio, height: size.height)
}else{
newSize = CGSize( 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, 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)
})
}