[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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- experience
- information
- love
- problem
- exercise
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- accessory
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- story
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- objective c
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- glsl
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- movie
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- performance
- report
- end banquet
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- tone mapping
- stylization
- firework
- face detection
- future
- screen
- color space
- photograph
- hong kong
- profession
- course
- version
- function
- wwdc
- news
- introduction
- banquet
- track
- buddha
- shop
- culture
- buffet
- photoimpact
- sleep
- bbq
- learn
- advertisement
- friendship
- github
- religion
- git
- scenery
- korea
- salary
- role
- group
- media
- message
- communication
- wedding
- growth
- mission
- rule
- repair
- marathon
- high dynamic range
- algorithm
- sex
- flower
- conference
- plan
- enterprise
- concept
- attitude
- event
- smart phone
- habit
- rgb
- park
- brand
- value
- application
- boss
- setting
- share
- uiwebview
- vacation
- flowchart
- ibeacon
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- google map
- celebrity
- mv
- meeting
- decision
- leisure
- analysis
- japan
- night market
- couple
- c++
- web
- stitch
- noodle
- filter
- itunes
- station
- route
- bus
- train
- christmas
- open data
- c/c++
- management
- cartoon
- facility
- self
- anniversary
- holiday
- calory
- developer
- guide
- certificate
HappyMan・迴響