EGORefreshTableHeaderView —— UITableView下拉刷新页面的实现

以前看到facebook,人人和其他的一些应用,很多都使用了下拉列表,列表就重新加载数据的应用.感觉用户体验很好,但是一直没有时间找相应的解决方法,今天终于有时间整理一下代码:

下图是实现的效果图,当用户下拉列表的时候,就出现向上的箭头.

 

实现的开源框架是:https://github.com/enormego/EGOTableViewPullRefresh

实现过程很简单,下载相应的demo,然后拷贝资源文件和EGORefreshTableHeaderView.h和EGORefreshTableHeaderView.m到相依的工程中.在table所在的类中添加如下代码:

01	#import <UIKit/UIKit.h>

02	#import "EGORefreshTableHeaderView.h"

03	<a href="http://my.oschina.net/interface" class="referer"target="_blank">@interface</a> iphone_navtaViewController : UIViewController

04	<UITableViewDelegate,UITableViewDataSource,EGORefreshTableHeaderDelegate>{

05	BOOL isflage;

06	IBOutlet UITableView *myTableView;

07	EGORefreshTableHeaderView *_refreshHeaderView;

08	BOOL _reloading;

09

}

10	@property (nonatomic,retain) UITableView *myTableView;

11	- (void)reloadTableViewDataSource;

12	- (void)doneLoadingTableViewData;

13

@end

实现方法：

01	#import "iphone_navtaViewController.h"

02	@implementation iphone_navtaViewController

03	@synthesize myTableView;

04	- (void)viewDidLoad {

05	[super viewDidLoad];

06	if (_refreshHeaderView == nil) {

07	EGORefreshTableHeaderView *view1 = [[EGORefreshTableHeaderView alloc] initWithFrame:CGRectMake(0.0f, 10.0f – self.myTableView.bounds.size.height, self.myTableView.frame.size.width, self.view.bounds.size.height)];

08	view1.delegate = self;

09	[self.myTableView addSubview:view1];

10	_refreshHeaderView = view1;

11	[view1 release];

12

}

13	[_refreshHeaderView refreshLastUpdatedDate];

14

}

15	- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

16	return (interfaceOrientation == UIInterfaceOrientationPortrait);

17

}

18	- (void)didReceiveMemoryWarning {

19	[super didReceiveMemoryWarning];

20

}

21	- (void)viewDidUnload {

22	self.myTableView=nil;

23	_refreshHeaderView=nil;

24

}

25	- (void)dealloc {

26	_refreshHeaderView=nil;

27	[self.myTableView release];

28	[super dealloc];

29

}

30	#pragma mark –

31	#pragma mark onClick

32	-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

33

{

34	isflage=!isflage;

35	[super.navigationController setNavigationBarHidden:isflage animated:TRUE];

36	[super.navigationController setToolbarHidden:isflage animated:TRUE];

37

}

38	#pragma mark –

39	#pragma mark UITableView

40	- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

41

return 1;

42

}

43	- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

44

return 3;

45

}

46	- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

47	UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:@"tag"];

48	if (cell==nil) {

49	cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle

50	reuseIdentifier:@"tag"] autorelease];

51

}

52

//表格设计

53	return cell;

54

}

55	-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

56

{

57	return 100;

58

}

59

60	#pragma mark –

61	#pragma mark Data Source Loading / Reloading Methods

62

63	- (void)reloadTableViewDataSource{

64	NSLog(@"==开始加载数据");

65	_reloading = YES;

66

}

67

68	- (void)doneLoadingTableViewData{

69	NSLog(@"===加载完数据");

70	_reloading = NO;

71	[_refreshHeaderView egoRefreshScrollViewDataSourceDidFinishedLoading:self.myTableView];

72

}

73	#pragma mark –

74	#pragma mark UIScrollViewDelegate Methods

75	- (void)scrollViewDidScroll:(UIScrollView *)scrollView{

76	[_refreshHeaderView egoRefreshScrollViewDidScroll:scrollView];

77

}

78

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

80	[_refreshHeaderView egoRefreshScrollViewDidEndDragging:scrollView];

81

}

82	#pragma mark –

83	#pragma mark EGORefreshTableHeaderDelegate Methods

84	- (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view{

85	[self reloadTableViewDataSource];

86	[self performSelector:@selector(doneLoadingTableViewData) withObject:nil afterDelay:3.0];

87

}

88

89	- (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view{

90	return _reloading;

91

}

92	- (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view{

93	return [NSDate date];

94

}

95

@end

一个最重要的步骤，就是要添加QuartzCore.framework组建。

然后运行即可。

文章出处：http://wangjun.easymorse.com/?p=1193