for iwatch (5)
{"Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "www.meitu.com", "Image DateTime": "2015:12:22 10:48:37", "Image ExifOffset": "136", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "302", "Thumbnail JPEGInterchangeFormatLength": "3686", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "750", "EXIF ExifImageLength": "700"}