xcode Swift 3 中来自路径或文件名的 UIImage
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UIImage from path or filename in Swift 3
提问by Andrea
i have a bunch of images in my App's Documents Directory. i want to load one of them in an UIImage that i have in my view. this is what i do:
我的应用程序的文档目录中有一堆图像。我想在我认为的 UIImage 中加载其中一个。这就是我所做的：
myImage.image = UIImage(named: "image.jpg") // the file exist but this returns nil
I also tried to init the image using:
我还尝试使用以下方法初始化图像：
myImage.image = UIImage(contentsOfFile: imagePath) //this also doesn't work but the path i got starts (at least in the sim) with file://
Anyone can suggest something? I'm kinda a noob in iOS programming.
任何人都可以提出建议吗？我是 iOS 编程的菜鸟。
Thanks
谢谢
EDIT: imagePath comes from:
编辑：imagePath 来自：
func getImgPath(name: String) -> String
{
let documentsDirectory = self.getDocumentsDirectory()
let fullpath = documentsDirectory.appendingPathComponent(name)
return fullpath.absoluteString
}
回答by Maulik Bhuptani
This might help
这可能有帮助
let documentDirectory = FileManager.SearchPathDirectory.documentDirectory
let userDomainMask = FileManager.SearchPathDomainMask.userDomainMask
let paths = NSSearchPathForDirectoriesInDomains(documentDirectory, userDomainMask, true)
if let dirPath = paths.first
{
let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("name.png")
let image = UIImage(contentsOfFile: imageURL.path)
// Do whatever you want with the image
}
回答by Maulik Bhuptani
Try adding your images under Assets.xcassets. Then you'll be able to reference your image by:
尝试在 下添加您的图像Assets.xcassets。然后，您将能够通过以下方式引用您的图像：
UIImage(named: 'yourImageName')
You can conveniently add images with various size settings.
您可以方便地添加具有各种尺寸设置的图像。
回答by paper1111
You can get the path of the image as fowllows:
你可以得到图像的路径如下：
let imagePath = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent("image.jpg")
If this doesn't work, check if your file name is correct.
如果这不起作用，请检查您的文件名是否正确。
回答by Austin Michael
I understand that if you are downloading images from internet means, you need to convert the URLto UIImage
我了解，如果您从 Internet 下载图像，则需要将其转换URL为UIImage
if let url = URL(string: "your url") {
let data = try? Data(contentsOf: url)
if let imageData = data {
if let image = UIImage(data: imageData) {
imageView.image = image
}
}
}
If i understand your question correct, this will be the answer.
如果我理解你的问题是正确的，这将是答案。
