UIScrollView:常用属性
@property(nonatomic) UIEdgeInsets contentInset; // default UIEdgeInsetsZero. add additional scroll area around content
@property(nonatomic,getter=isPagingEnabled) BOOL pagingEnabled; // default NO. if YES, stop on multiples of view bounds
@property(nonatomic) BOOL showsHorizontalScrollIndicator; // default YES. show indicator while we are tracking. fades out after tracking
@property(nonatomic) BOOL showsVerticalScrollIndicator; // default YES. show indicator while we are tracking. fades out after tracking
@property(nonatomic) CGFloat minimumZoomScale; // default is 1.0 (缩放属性)
@property(nonatomic) CGFloat maximumZoomScale; // default is 1.0. must be > minimum zoom scale to enable zooming
常用代理方法
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView; // return a view that will be scaled. if delegate returns nil, nothing happens (实现缩放)
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView; //
- (void)scrollViewDidScroll:(UIScrollView *)scrollView; //滚动时执行
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate;
UIPageControl:常用属性 (一般配合NSTimer使用)
@property(nonatomic) NSInteger numberOfPages;
@property(nonatomic) NSInteger currentPage;
NSTimer:常用方法
- (void)invalidate; 当屏幕被手动滚动的时候应该让timer失效, [timer invalidate],然后清空timer = nil;
当滚动停止的时候再创建timer,设置
+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)ti target:(id)aTarget selector:(SEL)aSelector userInfo:(id)userInfo repeats:(BOOL)yesOrNo; (次方法在多滚动试图中,只能滚动一个)
+ (NSTimer *)timerWithTimeInterval:(NSTimeInterval)ti target:(id)aTarget selector:(SEL)aSelector userInfo:(id)userInfo repeats:(BOOL)yesOrNo; (此方法需要配合NSRunLoop使用)
NSRunLoop的对象方法调用者是 [NSRunLoop main]
- (void)addTimer:(NSTimer *)timer forMode:(NSString *)mode;
timer 传入上方法返回的对象
mode 传入NSRunLoopCommonModes
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