ios 讀書會分享 (20150418)

7
Copy or not copy Smart Wang

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Page 1: iOS 讀書會分享 (20150418)

Copy or not copySmart Wang

Page 2: iOS 讀書會分享 (20150418)

Class• refence

copy reference

modify by obj2 obj1 be

modified too

Page 3: iOS 讀書會分享 (20150418)

Class• let

let

can modify content

let reference

Page 4: iOS 讀書會分享 (20150418)

struct / enum• copy

can modify

properties

Page 5: iOS 讀書會分享 (20150418)

struct / enum• let

p1 is struct

can not modify content

Page 6: iOS 讀書會分享 (20150418)

• parameter

function

default let can not be assign

var

can be assign

Page 7: iOS 讀書會分享 (20150418)