从parse.com加载图像 [英] Loading images from parse.com
问题描述
这是我要解析的保存图像:
This is my saving image to parse:
func uploadPost(){
var imageText = self.imageText.text
if (imageView.image == nil){
println("No image uploaded")
}
else{
var posts = PFObject(className: "Posts")
posts["imageText"] = imageText
posts["uploader"] = PFUser.currentUser()
posts.saveInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
if error == nil{
//**Success saving, now save image.**//
// Create an image data
var imageData = UIImagePNGRepresentation(self.imageView.image)
// Create a parse file to store in cloud
var parseImageFile = PFFile(name: "upload_image.png", data: imageData)
posts["imageFile"] = parseImageFile
posts.saveInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
if error == nil{
// Take user home
println("Data uploaded")
}
else{
println(error)
}
})
}
else{
println(error)
}
})
}
}
如何从解析中加载图像?这就是我的Parse.com帖子"数据的样子:
How can I load the images from parse? This is how my Parse.com "Posts" data looks like:
有什么建议吗?
我认为也许是这样的:
self.imageView.sd_setImageWithURL(url, completed: block)
但是我不知道如何获取URL.如果图像名称不同怎么办?
But I don´t know how I get the URL. And what if the images has different names?
推荐答案
尝试类似的方法
let imageFile = pfObject["imageFile"] as? PFFile
if imageFile != nil{
imageFile!.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
self.imageView.image = UIImage(data: imageData)!
}
}
}
}
其中pfObject是对对象的引用.还有其他方法可以检查nil值,但这应该可以工作.
Where pfObject is the reference to your object. There are other ways you could check for a nil value, but this should work.
只要您有对正确对象的引用(可以通过查询objectId来获得引用),则只需要存储图像文件所在列的名称,而不需要图像文件本身.
As long as you have a reference to the correct object (which you can get via a query for objectId) then you should only need the name of the column the image is file is stored in and not the image file itself.
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