[iOS] 單例 (Singleton)
單例 (Singleton) 或稱單一實體，也就是程式運行時，此Class永遠只有一個實體。
原本生成一個實體寫法：
HappyClass *class = [[HappyClass alloc] init];
程式每次執行到此，都會重新生成一個實體。若有多重執行緒，很有可能不小心生成多個實體；或是操作流程多變，也是可能會生成多個實體。
Just My Life & My Work
標籤雲
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- opencv
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- practice
- technique
- problem
- xcode
- statistics
- activity
- health
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- information
- comparison
- love
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- accessory
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- art
- story
- apple
- software
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- platform
- article
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- user interface
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- animation
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- environment
- movies
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- project
- game
- mrt
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- quotation
- image
- career
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- lecture
- ipad
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- song
- objective c
- image processing
- income
- notification
- wealth
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- achievement
- glsl
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- apple watch
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- observation
- friend
- macbook
- Flutter
- 財富
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- paper
- business
- lyrics
- file
- product
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- money
- competition
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- library
- all you can eat
- movie
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- mountain
- trend
- gift
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- truth
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- coffee
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- birthday
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- Ionic
- team
- hamburger
- celebration
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- report
- typhoon
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- introduction
- repair
- flow
- breakfast
- reunion
- version
- function
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- bluetooth
- track
- shop
- notebook
- face detection
- family
- language
- svm
- friendship
- end banquet
- scenery
- salary
- group
- mission
- election
- tone mapping
- stylization
- firework
- future
- sleep
- learn
- event
- advertisement
- screen
- color space
- photograph
- brand
- hong kong
- profession
- course
- git
- wwdc
- news
- media
- wedding
- banquet
- cocoapods
- certificate
- rule
- buddha
- culture
- flower
- buffet
- photoimpact
- plan
- bbq
- smart phone
- crash
- github
- religion
- korea
- role
- setting
- anniversary
- message
- holiday
- convenience store
- communication
- 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
- vacation
- flowchart
- ibeacon
- android
- energy
- 疫情
- 新冠肺炎
- covid-19
- celebrity
- mv
- meeting
- decision
- leisure
- analysis
- japan
- night market
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