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1 ： 如果無法保證子類行爲的一致性，那麼就用委託 If the subClass cann't keep with superClass,use delegate rather than inheritance. |
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2: 屏 幕上看到的，都是 UIVew Everything you see on Screen is UIView. |
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3: 如 果對性能要求高，慎用 Interface Build if application's performance is important,be discreet for the interface build. |
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4:copy 是創建， retain 是引用 the copy operation is create a new one,but the retain operation is just a reference. |
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5 ： alloc 需要 release,convenient 不需要 release alloc method need corresponding release method,but convenient method not. |
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6: 加 載到 NSArray/NSMutableArray 裏的對象，不需要負責 release The objects added to NSArray/NSMutableArray need not to be released. |
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7:IBOutlet,IBAction 爲你開啓了訪問 Interface Build 中對象的大門 IBOutlet and IBAction open the door to access the objects in Interface build. |
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8:UIApplicationDelegate 負責應用程序的生命週期，而 UIViewController 負責 View 的生命週期 UIApplicationDelegate is responsible for the application life cycle,but UIViewController for the UIView. |
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9: 爲 了程序的健壯性，請儘量實現 Delegate 的生命週期函數 if you want to develop a robust application,implement the life cycle methods as more as possbile. |
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10: 哥 觸摸的不是 UIEvent, 而是 NSSet 的 UIView what you touch on screen is not UIEvent but UIView |