[工學(xué)]ios編程 targetaction 實(shí)驗(yàn)指導(dǎo)-文庫(kù)吧
2025-01-04 10:56 本頁(yè)面
【正文】 tAction是 UIControl類(lèi)中定義的一種機(jī)制，凡是 UIControl子類(lèi)的對(duì)象都可以通過(guò)設(shè)置 target和action來(lái)通過(guò)消息觸發(fā)某個(gè)操作。 TargetAction ? UIControl類(lèi)的聲明 @interface UIControl : UIView { NSMutableArray* _targetActions。 CGPoint _previousPoint。 CFAbsoluteTime _downTime。 } (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents。 (void)removeTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents。 (NSArray *)actionsForTarget:(id)target forControlEvent:(UIControlEvents)controlEvent。 (void)sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event。 (void)sendActionsForControlEvents:(UIControlEvents)controlEvents。 @end TargetAction NSButton NSMutableArray* _targetActions。 target action id method id method id method id method obj obj obj obj TargetAction ? UIControlEvents enum { UIControlEventTouchDown = 1 0, UIControlEventTouchDownRepeat = 1 1, UIControlEventTouchDragInside = 1 2, UIControlEventTouchDragOutside = 1 3, UIControlEventTouchDragEnter = 1 4, UIControlEventTouchDragExit = 1 5, UIControlEventTouchUpInside = 1
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1