UIScrollView

1.contentOffset

/** 內容向外偏移,只在初始狀態有效,拉拽后偏移量變回0*/

@PRoperty(nonatomic) CGPoint contentOffset

2.contentSize

/** 內容大小*/

@property(nonatomic) CGSize contentSize

3.contentInset

/** 內容向內偏移,一直有效*/

@property(nonatomic) UIEdgeInsets contentInset

4.scrollEnabled

/** 滾動可否*/

@property(nonatomic, getter=isScrollEnabled) BOOL scrollEnabled

5.directionLockEnabled

/** 是否支持同一時間垂直水平同時可拉拽,默認支持*/

@property(nonatomic, getter=isDirectionalLockEnabled) BOOL directionalLockEnabled

Discussion

If this property is NO, scrolling is permitted in both horizontal and vertical directions. If this property is YES and the user begins dragging in one general direction (horizontally or vertically), the scroll view disables scrolling in the other direction. If the drag direction is diagonal, then scrolling will not be locked and the user can drag in any direction until the drag completes. The default value is NO

6.pageEnabled

/** 滾動時最后會停在整數倍位置*/

@property(nonatomic, getter=isPagingEnabled) BOOL pagingEnabled

7.bounces

/** 遇到邊界是否會碰撞返回,默認YES*/

@property(nonatomic) BOOL bounces

8.decelerationRate

/** 滾動后減速的速度*/

@property(nonatomic) CGFloat decelerationRate

Discussion

Your application can use the UIScrollViewDecelerationRateNormal and UIScrollViewDecelerationRateFast constants as reference points for reasonable deceleration rates.

9.tracking/dragging/decelerating

/** tracking發生在剛接觸屏幕,dragging發生在拖拽時,decelerating發生在手松開后還滾動的時候*/

@property(nonatomic, readonly, getter=isTracking) BOOL tracking

@property(nonatomic, readonly, getter=isDragging) BOOL dragging

@property(nonatomic, readonly, getter=isDecelerating) BOOL decelerating

10.indicatorStyle

/** 滾動條Style*/

@property(nonatomic) UIScrollViewIndicatorStyle indicatorStyle

默認Default樣式

typedef enum : NSInteger {

   UIScrollViewIndicatorStyleDefault,

   UIScrollViewIndicatorStyleBlack,

   UIScrollViewIndicatorStyleWhite 

} UIScrollViewIndicatorStyle;

11.scrollIndicatorInsets

/** 滾動條內嵌距離*/

@property(nonatomic) UIEdgeInsets scrollIndicatorInsets

12.showsHorizontalScrollIndicator/VerticalScrollIndicator

/** 是否顯示滾動條*/

@property(nonatomic) BOOL showsHorizontalScrollIndicator

@property(nonatomic) BOOL showsVerticalScrollIndicator

13.FlashScrollIndicators

/** 顯示滾動條在最前面時調用*/

- (void)flashScrollIndicators

Discussion

You should call this method whenever you bring the scroll view to front.

14.delegate

/** 代理*/

@property(nonatomic, assign) id< UIScrollViewDelegate > delegate

Discussion

The delegate must adopt the UIScrollViewDelegate protocol. 

15.keyboardDismissMode

/** 鍵盤消失時間*/

@property(nonatomic) UIScrollViewKeyboardDismissMode keyboardDismissMode

默認None

typedef enum : NSInteger {

   UIScrollViewKeyboardDismissModeNone,

   UIScrollViewKeyboardDismissModeOnDrag,

   UIScrollViewKeyboardDismissModeInteractive 

}UIScrollViewKeyboardDismissMode;

UIScrollViewDelegate

1.Dragging and Scrolling

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView

- (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView

- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView

The scroll view calls this method at the end of its implementations of the setContentOffset:animated: and scrollRectToVisible:animated: methods, but only if animations are requested.

2.Zooming

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

Return Value

A UIView object that will be scaled as a result of the zooming gesture. Return nil if you don’t want zooming to occur.

- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale

- (void)scrollViewDidZoom:(UIScrollView *)scrollView