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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
}
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原文地址：http://www.cnblogs.com/linxiu-0925/p/5885638.html
