UIScrollView UITableView 上提刷新代码
下面是.h文件的代码
// // EGORefreshTableHeaderView.h // Demo // // Created by Devin Doty on 10/14/09October14. // Copyright 2009 enormego. All rights reserved. // #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; - (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
下面是.m文件的代码
// // EGORefreshTableHeaderView.m // Demo // //修改人：禚来强 iphone开发qq群：79190809 邮箱：[email protected] // #define RefreshViewHight 65.0f #import "EGORefreshTableHeaderView.h" #define TEXT_COLOR [UIColor colorWithRed:87.0/255.0 green:108.0/255.0 blue:137.0/255.0 alpha:1.0] #define FLIP_ANIMATION_DURATION 0.18f @interface EGORefreshTableHeaderView (Private) - (void)setState:(EGOPullRefreshState)aState; @end @implementation EGORefreshTableHeaderView @synthesize delegate=_delegate; - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame: frame]; if (self) { self.autoresizingMask = UIViewAutoresizingFlexibleWidth; self.backgroundColor = [UIColor colorWithRed:226.0/255.0 green:231.0/255.0 blue:237.0/255.0 alpha:1.0]; UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, RefreshViewHight - 30.0f, self.frame.size.width, 20.0f)]; label.autoresizingMask = UIViewAutoresizingFlexibleWidth; label.font = [UIFont systemFontOfSize:12.0f]; label.textColor = TEXT_COLOR; label.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f]; label.shadowOffset = CGSizeMake(0.0f, 1.0f); label.backgroundColor = [UIColor clearColor]; label.textAlignment = UITextAlignmentCenter; [self addSubview:label]; _lastUpdatedLabel=label; [label release]; label = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, RefreshViewHight - 48.0f, self.frame.size.width, 20.0f)]; label.autoresizingMask = UIViewAutoresizingFlexibleWidth; label.font = [UIFont boldSystemFontOfSize:13.0f]; label.textColor = TEXT_COLOR; label.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f]; label.shadowOffset = CGSizeMake(0.0f, 1.0f); label.backgroundColor = [UIColor clearColor]; label.textAlignment = UITextAlignmentCenter; [self addSubview:label]; _statusLabel=label; [label release]; CALayer *layer = [CALayer layer]; layer.frame = CGRectMake(25.0f, RefreshViewHight - RefreshViewHight, 30.0f, 55.0f); layer.contentsGravity = kCAGravityResizeAspect; layer.contents = (id)[UIImage imageNamed:@"blueArrow.png"].CGImage; #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000 if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) { layer.contentsScale = [[UIScreen mainScreen] scale]; } #endif [[self layer] addSublayer:layer]; _arrowImage=layer; UIActivityIndicatorView *view = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]; view.frame = CGRectMake(25.0f, RefreshViewHight - 38.0f, 20.0f, 20.0f); [self addSubview:view]; _activityView = view; [view release]; [self setState:EGOOPullRefreshNormal]; } return self; } // // EGORefreshTableHeaderView.h // Demo // // Created by Devin Doty on 10/14/09October14. // Copyright 2009 enormego. All rights reserved. // //修改人：禚来强 iphone开发qq群：79190809 邮箱：[email protected] //原文地址：http://blog.csdn.net/diyagoanyhacker/archive/2011/05/24/6441805.aspx #pragma mark - #pragma mark Setters - (void)refreshLastUpdatedDate { if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceLastUpdated:)]) { NSDate *date = [_delegate egoRefreshTableHeaderDataSourceLastUpdated:self]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setAMSymbol:@"上午"]; [formatter setPMSymbol:@"下午"]; [formatter setDateFormat:@"yyyy/MM/dd hh:mm:a"]; _lastUpdatedLabel.text = [NSString stringWithFormat:@"最后更新: %@", [formatter stringFromDate:date]]; [[NSUserDefaults standardUserDefaults] setObject:_lastUpdatedLabel.text forKey:@"EGORefreshTableView_LastRefresh"]; [[NSUserDefaults standardUserDefaults] synchronize]; [formatter release]; } else { _lastUpdatedLabel.text = nil; } } - (void)setState:(EGOPullRefreshState)aState{ switch (aState) { case EGOOPullRefreshPulling: _statusLabel.text = NSLocalizedString(@"松开即可更新...", @"松开即可更新..."); [CATransaction begin]; [CATransaction setAnimationDuration:FLIP_ANIMATION_DURATION]; _arrowImage.transform = CATransform3DMakeRotation((M_PI / 180.0) * 180.0f, 0.0f, 0.0f, 1.0f); [CATransaction commit]; break; case EGOOPullRefreshNormal: if (_state == EGOOPullRefreshPulling) { [CATransaction begin]; [CATransaction setAnimationDuration:FLIP_ANIMATION_DURATION]; _arrowImage.transform = CATransform3DIdentity; [CATransaction commit]; } _statusLabel.text = NSLocalizedString(@"上拉即可更新...", @"上拉即可更新..."); [_activityView stopAnimating]; [CATransaction begin]; [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions]; _arrowImage.hidden = NO; _arrowImage.transform = CATransform3DIdentity; [CATransaction commit]; [self refreshLastUpdatedDate]; break; case EGOOPullRefreshLoading: _statusLabel.text = NSLocalizedString(@"加载中...", @"加载中..."); [_activityView startAnimating]; [CATransaction begin]; [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions]; _arrowImage.hidden = YES; [CATransaction commit]; break; default: break; } _state = aState; } #pragma mark - #pragma mark ScrollView Methods //手指屏幕上不断拖动调用此方法 - (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView { if (_state == EGOOPullRefreshLoading) { CGFloat offset = MAX(scrollView.contentOffset.y * -1, 0); offset = MIN(offset, 60); scrollView.contentInset = UIEdgeInsetsMake(0.0, 0.0f, RefreshViewHight, 0.0f); } else if (scrollView.isDragging) { BOOL _loading = NO; if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceIsLoading:)]) { _loading = [_delegate egoRefreshTableHeaderDataSourceIsLoading:self]; } if (_state == EGOOPullRefreshPulling && scrollView.contentOffset.y + (scrollView.frame.size.height) < scrollView.contentSize.height + RefreshViewHight && scrollView.contentOffset.y > 0.0f && !_loading) { [self setState:EGOOPullRefreshNormal]; } else if (_state == EGOOPullRefreshNormal && scrollView.contentOffset.y + (scrollView.frame.size.height) > scrollView.contentSize.height + RefreshViewHight && !_loading) { [self setState:EGOOPullRefreshPulling]; } if (scrollView.contentInset.bottom != 0) { scrollView.contentInset = UIEdgeInsetsZero; } } } //当用户停止拖动，并且手指从屏幕中拿开的的时候调用此方法 - (void)egoRefreshScrollViewDidEndDragging:(UIScrollView *)scrollView { BOOL _loading = NO; if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceIsLoading:)]) { _loading = [_delegate egoRefreshTableHeaderDataSourceIsLoading:self]; } if (scrollView.contentOffset.y + (scrollView.frame.size.height) > scrollView.contentSize.height + RefreshViewHight && !_loading) { if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDidTriggerRefresh:)]) { [_delegate egoRefreshTableHeaderDidTriggerRefresh:self]; } [self setState:EGOOPullRefreshLoading]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.2]; scrollView.contentInset = UIEdgeInsetsMake(0.0f, 0.0f, RefreshViewHight, 0.0f); [UIView commitAnimations]; } } //当开发者页面页面刷新完毕调用此方法，[delegate egoRefreshScrollViewDataSourceDidFinishedLoading: scrollView]; - (void)egoRefreshScrollViewDataSourceDidFinishedLoading:(UIScrollView *)scrollView { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:.3]; [scrollView setContentInset:UIEdgeInsetsMake(0.0f, 0.0f, 0.0f, 0.0f)]; [UIView commitAnimations]; [self setState:EGOOPullRefreshNormal]; } #pragma mark - #pragma mark Dealloc - (void)dealloc { _delegate=nil; _activityView = nil; _statusLabel = nil; _arrowImage = nil; _lastUpdatedLabel = nil; [super dealloc]; } @end
下面是调用类的代码
// // RootViewController.m // TableViewPull // // Created by Devin Doty on 10/16/09October16. // Copyright enormego 2009. All rights reserved. // //修改：禚来强 email：[email protected] #import "RootViewController.h" @implementation RootViewController - (void)viewDidLoad { [super viewDidLoad]; [self.tableView reloadData]; //self.tableView.contentInset = UIEdgeInsetsMake(200, 0, 320, 480); if (_refreshHeaderView == nil) { EGORefreshTableHeaderView *view = [[EGORefreshTableHeaderView alloc] initWithFrame: CGRectMake(0.0f, self.tableView.contentSize.height, 320, 650)]; NSLog(@"%@", NSStringFromCGRect( view.frame )); view.delegate = self; [self.tableView addSubview:view]; _refreshHeaderView = view; [view release]; } // update the last update date [_refreshHeaderView refreshLastUpdatedDate]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } #pragma mark - #pragma mark UITableViewDataSource - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 10; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 4; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. return cell; } - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{ return [NSString stringWithFormat:@"Section %i", section]; } #pragma mark - #pragma mark Data Source Loading / Reloading Methods - (void)reloadTableViewDataSource{ // should be calling your tableviews data source model to reload // put here just for demo _reloading = YES; } - (void)doneLoadingTableViewData{ // model should call this when its done loading _reloading = NO; [_refreshHeaderView egoRefreshScrollViewDataSourceDidFinishedLoading:self.tableView]; } #pragma mark - #pragma mark UIScrollViewDelegate Methods - (void)scrollViewDidScroll:(UIScrollView *)scrollView{ [_refreshHeaderView egoRefreshScrollViewDidScroll:scrollView]; } - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{ [_refreshHeaderView egoRefreshScrollViewDidEndDragging:scrollView]; } #pragma mark - #pragma mark EGORefreshTableHeaderDelegate Methods - (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view{ [self reloadTableViewDataSource]; [self performSelector:@selector(doneLoadingTableViewData) withObject:nil afterDelay:4.0]; } - (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view{ return _reloading; // should return if data source model is reloading } - (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view{ return [NSDate date]; // should return date data source was last changed } #pragma mark - #pragma mark Memory Management - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (void)viewDidUnload { _refreshHeaderView=nil; } - (void)dealloc { _refreshHeaderView = nil; [super dealloc]; } @end