我在表视图中选择一个单元格,将值传递给视图控制器,然后允许用户使用下面的代码更新Parse上的行(在Heroku上运行)。
我正面临的问题是 - “标题”列已更新,但图像文件列未更新所选的新图像。我可以看到新图像确实传递到代码中。
我正在使用同步调用,因为除非保存记录,否则不希望用户继续前进。
什么可能是错的?保存新对象的相同代码工作正常。由于 阿希什
let query = PFQuery(className:"class")
query.whereKey("objectId", containsString: passedObject.objectId)
do {
let results = try query.findObjects()
if results.count == 0 {
print("error")
success = false
} else {
//update
do {
let obj = results.first
obj!["title"] = Title.text!
let imageData = UIImageJPEGRepresentation(imageOutlet.image!,0.2)
let imageFile = PFFile(name: "image.png", data: imageData!)
//try imageFile?.save() // is this needed?
obj!["imagefile"] = imageFile
try obj!.save()
self.success = true
} catch let er as NSError {
print(" error while updating - \(er)")
}
}
} catch {
print("error while querying \(error)")
success = false
}
答案 0 :(得分:1)
我在我身边进行了一些测试,这段代码对我有用:
Aync版本
let query = PFQuery(className: "FileTest")
query.findObjectsInBackgroundWithBlock {
(objects: [PFObject]?, error: NSError?) -> Void in
let imageData = UIImageJPEGRepresentation(self.imageOutlet.image!, 0.2)
let fileToSave = PFFile(name: "myfile.png", data: imageData!)
let firstObj = objects?.first
firstObj!["fileToSave"] = fileToSave
firstObj!.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in
print("Object has been saved.")
}
}
同步版本
let query = PFQuery(className: "FileTest")
do {
let objects = try query.findObjects()
let firstObj = objects.first
let imageData = UIImageJPEGRepresentation(self.imageOutlet.image!, 0.2)
let fileToSave = PFFile(name: "myfile.png", data: imageData!)
firstObj!["fileToSave2"] = fileToSave
try firstObj!.save()
print("object saved")
} catch let er as NSError {
print("error")
}