How Resolve ImageAssest Complile time?

The Contents.json describing the image set "BG_Email_Textfield.imageset" must start with a top level dictionary.

how we could solve this ?

This often occurs when the merge conflicts, you can open the YourImageName.imageset folder in Finder and edit Contents.json, remove the code conflict.

In my case, I merge conflicting files like this:

{
  "images" : [
    {
      "idiom" : "universal",
      "scale" : "1x"
    },
    {
      "idiom" : "universal",
      "scale" : "2x",
      "filename" : "BodySelfieTabbarItem@2x.png"
    }
  ],
  "info" : {
    "version" : 1,
<<<<<<< HEAD
    "author" : "xcode",
    "template-rendering-intent" : "original"
=======
    "author" : "xcode"
>>>>>>> f15823d967d53508370cfcbd708e15ee2fad328e
  }
}

After removing the code conflicts like this:

{
  "images" : [
    {
      "idiom" : "universal",
      "scale" : "1x"
    },
    {
      "idiom" : "universal",
      "scale" : "2x",
      "filename" : "BodySelfieTabbarItem@2x.png"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "xcode",
    "template-rendering-intent" : "original"
  }
}