How iOS implements a UITableView drop-down refresh

Using the Egorefreshtableheaderview to achieve:

Implement the Egorefreshtableheaderdelegate delegate on the controller

@property (nonatomic) uitableview* TableView; @property (nonatomic) nsmutablearray* data; @property (nonatomic) egorefreshtableheaderview* Refreshtableview; @property (nonatomic,assign) BOOL reloading;

Initialize First:

-(void) viewdidload{[Super Viewdidload];       Do any additional setup after loading the view.        uitoolbar* bar = [[Uitoolbar alloc] Initwithframe:cgrectmake (0, 0, 320, 44)]; uibarbuttonitem* item = [[Uibarbuttonitem alloc] Initwithbarbuttonsystemitem:uibarbuttonsystemitemadd target:self       Action: @selector (click)];    [Bar Setitems:[nsarray Arraywithobjects:item, Nil]];    [Self.view Addsubview:bar];    Self.tableview = [[UITableView alloc] Initwithframe:cgrectmake (0, 44,320,460-44)];    [Self.view Addsubview:_tableview];    Self.tableView.delegate = self;    Self.tableView.dataSource = self;    _data = [[Nsmutablearray alloc] init];    [_data addobject:@ "AA"];        [_data addobject:@ "CC"]; if (_refreshtableview = = nil) {egorefreshtableheaderview* Refreshtableview = [[Egorefreshtableheaderview alloc] In Itwithframe:cgrectmake (0,-self.tableview.bounds.size.height, Self.view.frame.size.width,        Self.tableView.bounds.size.height)]; Refreshtableview.delegaTe = self;        [_tableview Addsubview:refreshtableview];    _refreshtableview = Refreshtableview; }    }

It will be executed when the drop is pulled.

-(void) Egorefreshtableheaderdidtriggerrefresh: (egorefreshtableheaderview*) view{    _reloading = YES;    Perform a background thread after the refresh starts, before you can turn on the HUD or other UI blocking    [Nsthread detachnewthreadselector: @selector (doinbackground) Totarget: Self Withobject:nil];}

-(void) doinbackground{    NSLog (@ "Do in Background");    [_data addobject:@ "FF"];    [Nsthread Sleepfortimeinterval:3];    [Self Performselectoronmainthread: @selector (loadedtableviewdata) Withobject:nil Waituntildone:yes];}

-(void) loadedtableviewdata{    _reloading = NO;    [_refreshtableview EgoRefreshScrollViewDataSourceDidFinishedLoading:self.tableView];    [Self.tableview Reloaddata];}

This method indicates that a refresh is in progress

-(BOOL) egorefreshtableheaderdatasourceisloading: (egorefreshtableheaderview*) view{    return _reloading;}

This method shows the time on the refresh block of the TableView:

callback method to return refresh Time-(NSDate *) egorefreshtableheaderdatasourcelastupdated: (Egorefreshtableheaderview *) view{    return [NSDate Date];}

Then you must add the following two methods:

-(void) Scrollviewdidscroll: (Uiscrollview *) scrollview{    [_refreshtableview egorefreshscrollviewdidscroll: ScrollView];} -(void) scrollviewdidenddragging: (Uiscrollview *) ScrollView willdecelerate: (BOOL) decelerate{    [_ Refreshtableview Egorefreshscrollviewdidenddragging:scrollview];}

Code can be downloaded in http://download.csdn.net/detail/baidu_nod/7599913