加载到UIImageView

时间:2016-06-26 22:23:30

标签: ios iphone xcode swift uiimageview

在我的应用程序中,我有一个按钮,用于打开图库,如下所示:

@IBAction func selectPhoto() {
    let photoPicker = UIImagePickerController()
    photoPicker.delegate = self
    photoPicker.sourceType = .PhotoLibrary
    self.presentViewController(photoPicker, animated: true, completion: nil)
}

我让用户选择一张照片并保存:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    photoImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage        
    let fileName:String = "logo.png"        
    let arrayPaths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString        
    let pngFileName = arrayPaths.stringByAppendingPathComponent(fileName)                UIImagePNGRepresentation(photoImageView.image!)!.writeToFile(pngFileName, atomically:true)        
    imageSave.setObject(fileName, forKey: "pngFileName")        
    self.dismissViewControllerAnimated(false, completion: nil)
}

然后在View控制器中,每次用户使用以下代码到达场景时,都会显示保存的图片。

 override func viewDidLoad() {
    super.viewDidLoad()

    if imageSave.stringForKey("pngFileName") != nil
    {
        let path = NSSearchPathForDirectoriesInDomains(
            .DocumentDirectory, .UserDomainMask, true)[0] as NSString
        let fileName = NSUserDefaults.standardUserDefaults()
            .stringForKey("pngFileName")
        let imagePath = path.stringByAppendingPathComponent(fileName!)
        let image = UIImage(contentsOfFile: imagePath )            
        photoImageView.image = image

    }

问题:当图像加载回UIImageView时,图片的方向有时会向右旋转90度,有时会向左旋转90度,或者有时会在保存时显示。

请告诉我这里我做错了什么。任何帮助,将不胜感激。感谢

1 个答案:

答案 0 :(得分:0)

我遇到了同样的问题,因为照片显示的矩形大小不同。你可以做一个技巧,而不是原始图像保存复制版本。这将丢弃旋转问题,这实际上是一个合适的问题。

let imageName = info[UIImagePickerControllerOriginalImage] as! UIImage
let thumb1 = UIImageJPEGRepresentation(imageName, 0.8)
btnImageView.image = UIImage(data: thumb1!)

这只是一个快速而肮脏的答案,但对我有用。 : - )