search photo in flickr.com by tag
functions:
- search photo in flickr.com by tag
- view selected photo, can change it
- save photo as favorites
- left slip to remove photo in favorites
- auto save search records
- click search record to redo research
- left slip to remove search records
used:
- tab bar controller
- navegation controller
- tableview controller
- segue
- go to selected tabitem
- launch screen
- network NSURLSession
- json
- NSUserDefaults
- NSKeyedArchiver
- scrollview
- gesture