[iOS] 判斷App在前景或背景
收到推播時有兩種狀況：
- 前景 (Foreground)
- 背景 (Background)
Just My Life & My Work
標籤雲
- teach
- ios
- illustration
- food
- app
- life
- record
- chart
- travel
- chat
- tool
- restaurant
- work
- service
- photos
- relationship
- opencv
- experience
- practice
- technique
- problem
- xcode
- statistics
- activity
- health
- design
- information
- comparison
- love
- exercise
- accessory
- company
- book
- apple
- art
- story
- software
- iphone
- platform
- article
- map
- user interface
- bike
- animation
- jog
- marriage
- device
- photography
- environment
- movies
- memory
- thought
- video
- project
- game
- mrt
- festival
- sport
- transportation
- taiwan
- taipei
- opengl
- quotation
- image
- career
- research
- lecture
- ipad
- open source
- development
- youtube
- blender
- song
- objective c
- image processing
- income
- notification
- wealth
- motocycle
- achievement
- glsl
- music
- apple watch
- secret
- observation
- friend
- macbook
- Flutter
- 財富
- 秘密
- paper
- business
- lyrics
- file
- product
- user experience
- start-up
- money
- competition
- experiment
- library
- all you can eat
- movie
- photo
- mountain
- trend
- gift
- definition
- weather
- line
- network
- history
- hotel
- programming
- customization
- internet
- wifi
- birthday
- technology
- truth
- swift
- coffee
- camera
- install
- time
- job
- mac os x
- process
- debug
- framework
- Ionic
- team
- hamburger
- celebration
- recall
- performance
- architecture
- report
- typhoon
- review
- introduction
- repair
- flow
- breakfast
- reunion
- version
- function
- salary
- growth
- bluetooth
- track
- shop
- notebook
- face detection
- family
- language
- svm
- friendship
- end banquet
- scenery
- group
- mission
- certificate
- election
- tone mapping
- stylization
- firework
- future
- sleep
- learn
- event
- crash
- advertisement
- screen
- color space
- photograph
- brand
- hong kong
- profession
- course
- git
- wwdc
- news
- media
- wedding
- banquet
- cocoapods
- rule
- buddha
- culture
- flower
- buffet
- photoimpact
- plan
- bbq
- smart phone
- github
- religion
- korea
- role
- setting
- anniversary
- message
- holiday
- convenience store
- communication
- android
- google map
- colleague
- marathon
- high dynamic range
- algorithm
- sex
- conference
- enterprise
- web
- concept
- attitude
- itunes
- habit
- death
- rgb
- park
- value
- api
- application
- management
- name
- cartoon
- boss
- share
- uiwebview
- security
- sdk
- vacation
- flowchart
- ibeacon
- energy
- 疫情
- 新冠肺炎
- covid-19
- celebrity
- mv
- meeting
- decision
- leisure
- analysis
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