[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
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- opencv
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- xcode
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- information
- problem
- statistics
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- love
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- comparison
- accessory
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- platform
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- objective c
- notification
- image processing
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- income
- apple watch
- achievement
- paper
- article
- observation
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- competition
- experiment
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- all you can eat
- macbook
- product
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- reunion
- version
- function
- bluetooth
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- repair
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- notebook
- flow
- family
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- performance
- end banquet
- scenery
- group
- introduction
- swift
- growth
- mission
- election
- tone mapping
- stylization
- shop
- firework
- face detection
- future
- advertisement
- screen
- color space
- photograph
- hong kong
- profession
- course
- wwdc
- salary
- news
- banquet
- buddha
- culture
- buffet
- photoimpact
- sleep
- bbq
- learn
- friendship
- github
- religion
- git
- korea
- role
- setting
- media
- anniversary
- message
- communication
- wedding
- cocoapods
- certificate
- rule
- marathon
- high dynamic range
- algorithm
- sex
- flower
- conference
- plan
- enterprise
- concept
- attitude
- event
- smart phone
- crash
- habit
- rgb
- park
- brand
- value
- application
- management
- boss
- share
- uiwebview
- holiday
- vacation
- flowchart
- ibeacon
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- celebrity
- mv
- meeting
- decision
- leisure
- analysis
- japan
- night market
- couple
- c++
- web
- stitch
- noodle
- filter
- itunes
- station
- route
- bus
- train
- christmas
- open data
- migration
- c/c++
- name
- cartoon
- facility
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HappyMan・迴響