IOS下拉刷新Demo实现

// // EGORefreshTableHeaderView.h // Demo // // Created by Devin Doty on 10/14/09October14. // Copyright 2009 enormego. All rights reserved. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // #import <UIKit/UIKit.h> #import <QuartzCore/QuartzCore.h> typedef enum{ EGOOPullRefreshPulling = 0, EGOOPullRefreshNormal, EGOOPullRefreshLoading, } EGOPullRefreshState; @protocol EGORefreshTableHeaderDelegate; @interface EGORefreshTableHeaderView : UIView { id _delegate; EGOPullRefreshState _state; UILabel *_lastUpdatedLabel; UILabel *_statusLabel; CALayer *_arrowImage; UIActivityIndicatorView *_activityView; } @property(nonatomic,assign) id <EGORefreshTableHeaderDelegate> delegate; - (id)initWithFrame:(CGRect)frame arrowImageName:(NSString *)arrow textColor:(UIColor *)textColor; - (void)refreshLastUpdatedDate; - (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView; - (void)egoRefreshScrollViewDidEndDragging:(UIScrollView *)scrollView; - (void)egoRefreshScrollViewDataSourceDidFinishedLoading:(UIScrollView *)scrollView; @end @protocol EGORefreshTableHeaderDelegate - (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view; - (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view; @optional - (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view; @end