swift上传头像

很久没有写博客了，今天特地写了这个，也是一边仿照别人写的demo，注释部分都是需要的。需要的同学可以参考一下。

@IBAction func headImageBtnPage(){  //上传头像

//        let actionSheet = UIAlertController(title: "上传头像", message: nil, preferredStyle: .ActionSheet)

//        let cancelBtn = UIAlertAction(title: "取消", style: .Cancel, handler: nil)

//

//

//        let takePhotos = UIAlertAction(title: "拍照", style: .Destructive, handler: {

//            (action: UIAlertAction) -> Void in

//            //判断是否能进行拍照，可以的话打开相机

//            if UIImagePickerController.isSourceTypeAvailable(.Camera) {

//                let picker = UIImagePickerController()

//                picker.sourceType = .Camera

//                picker.delegate = self

//                picker.allowsEditing = true

//                self.presentViewController(picker, animated: true, completion: nil)

//

//            }

//            else

//            {

//                print("模拟其中无法打开照相机,请在真机中使用");

//            }

//

//        })

//        let selectPhotos = UIAlertAction(title: "相册选取", style: .Default, handler: {

//            (action:UIAlertAction)

//            -> Void in

//            //调用相册功能，打开相册

//            let picker = UIImagePickerController()

//            picker.sourceType = .PhotoLibrary

//            picker.delegate = self

//            picker.allowsEditing = true

//            self.presentViewController(picker, animated: true, completion: nil)

//

//        })

//        actionSheet.addAction(cancelBtn)

//        actionSheet.addAction(takePhotos)

//        actionSheet.addAction(selectPhotos)

//        self.presentViewController(actionSheet, animated: true, completion: nil)

//

}

}

//MARK: imagePickerController代理

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

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

//当选择类型是图片

if type == "head_icon_demo" {

//修正图片的位置

let image = fixOrientation((info[UIImagePickerControllerOriginalImage] as! UIImage))

//先把图片转成NSData

let data = UIImageJPEGRepresentation(image, 0.5)

//图片保存的路径

//这里将图片放在沙盒的documents文件夹中

//Home目录

let homeDirectory = NSHomeDirectory()

let documentPath = homeDirectory + "/Documents"

//文件管理器

let fileManager: NSFileManager = NSFileManager.defaultManager()

//把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png

do {

try fileManager.createDirectoryAtPath(documentPath, withIntermediateDirectories: true, attributes: nil)

}

catch _ {

}

fileManager.createFileAtPath(documentPath.stringByAppendingString("/image.png"), contents: data, attributes: nil)

//得到选择后沙盒中图片的完整路径

let filePath: String = String(format: "%@%@", documentPath, "/image.png")

print("filePath:" + filePath)

//发送请求上传头像的网络请求

//            Alamofire.upload(.POST, "http://192.168.3.16:9060/client/updateHeadUrl", multipartFormData: { multipartFormData in

//                let lastData = NSData(contentsOfFile: filePath)

//

//                multipartFormData.appendBodyPart(data: lastData!, name: "image")

//

//                }, encodingCompletion: { response in

//                    picker.dismissViewControllerAnimated(true, completion: nil)

//                    switch response {

//                    case .Success(let upload, _, _):

//                        upload.responseJSON(completionHandler: { (response) in

//                            print(response)

//                            self.imageView.image = UIImage(data: data!)

//

//                        })

//

//                    case .Failure(let encodingError):

//                        print(encodingError)

//                    }

//                })

}

}

func fixOrientation(aImage: UIImage) -> UIImage { //处理头像图片角度问题

// No-op if the orientation is already correct

if aImage.imageOrientation == .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: CGAffineTransform = CGAffineTransformIdentity

switch aImage.imageOrientation {

case .Down, .DownMirrored:

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

transform = CGAffineTransformRotate(transform, CGFloat(M_PI))

case .Left, .LeftMirrored:

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

transform = CGAffineTransformRotate(transform, CGFloat(M_PI_2))

case .Right, .RightMirrored:

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

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

default:

break

}

switch aImage.imageOrientation {

case .UpMirrored, .DownMirrored:

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

transform = CGAffineTransformScale(transform, -1, 1)

case .LeftMirrored, .RightMirrored:

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

transform = CGAffineTransformScale(transform, -1, 1)

default:

break

}

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

// calculated above.

//这里需要注意下CGImageGetBitmapInfo，它的类型是Int32的，CGImageGetBitmapInfo(aImage.CGImage).rawValue，这样写才不会报错

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 .Left, .LeftMirrored, .Right, .RightMirrored:

// Grr...

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

default:

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

}

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

let cgimg: CGImageRef = CGBitmapContextCreateImage(ctx)!

let img: UIImage = UIImage(CGImage: cgimg)

return img

}