1 import UIKit  2   3 class ViewController: UITableViewController {  4   5     // 用于显示的数据源  6     var _dataSource:[String] = []  7       8     // 加载更多 状态 风火轮  9     var _aiv:UIActivityIndicatorView! 10      11     override func viewDidLoad() { 12         super.viewDidLoad() 13         // Do any additional setup after loading the view, typically from a nib. 14          15         // 数据源中的基础数据 16         for i in 0...2 { 17              18             _dataSource.append("\(i)") 19         } 20          21         // 初始下拉刷新控件 22         self.refreshControl = UIRefreshControl() 23         self.refreshControl?.attributedTitle = NSAttributedString(string: "Pull To Refresh") 24         self.refreshControl?.tintColor = UIColor.greenColor() 25         self.refreshControl?.addTarget(self, action: "refresh", forControlEvents: .ValueChanged) 26          27         // 加载更多按扭的背景视图 28         var tableFooterView:UIView = UIView() 29         tableFooterView.frame = CGRectMake(0, 0, self.view.bounds.size.width, 44) 30         tableFooterView.backgroundColor = UIColor.greenColor() 31         self.tableView.tableFooterView = tableFooterView 32  33         // 加载更多的按扭 34         let loadMoreBtn = UIButton() 35         loadMoreBtn.frame = CGRectMake(0, 0, self.view.bounds.width, 44) 36         loadMoreBtn.setTitle("Load More", forState: .Normal) 37         loadMoreBtn.setTitleColor(UIColor.lightGrayColor(), forState: .Normal) 38         loadMoreBtn.addTarget(self, action: "loadMore:", forControlEvents: .TouchUpInside) 39         tableFooterView.addSubview(loadMoreBtn) 40          41         // 加载更多 状态 风火轮 42         _aiv = UIActivityIndicatorView(activityIndicatorStyle: .Gray) 43         _aiv.center = loadMoreBtn.center 44         tableFooterView.addSubview(_aiv) 45     } 46      47     // 加载更多方法 48     func loadMore(sender:UIButton) { 49          50         sender.hidden = true 51         _aiv.startAnimating() 52          53         dispatch_async(dispatch_get_global_queue(0, 0), { () -> Void in 54              55             self._dataSource.append("\(self._dataSource[self._dataSource.count-1].toInt()! + 1)") 56              57             dispatch_async(dispatch_get_main_queue(), { () -> Void in 58                  59                 sleep(1) 60                  61                 self._aiv.stopAnimating() 62                 sender.hidden = false 63  64                 self.tableView.reloadData() 65             }) 66         }) 67     } 68      69     // 下拉刷新方法 70     func refresh() { 71          72         if self.refreshControl?.refreshing == true { 73              74             self.refreshControl?.attributedTitle = NSAttributedString(string: "Loading...") 75         } 76          77         dispatch_async(dispatch_get_global_queue(0, 0), { () -> Void in 78              79             self._dataSource.insert("\(self._dataSource[0].toInt()! - 1)", atIndex: 0) 80              81             dispatch_async(dispatch_get_main_queue(), { () -> Void in 82                  83                 sleep(1) 84                  85                 self.refreshControl?.endRefreshing() 86                 self.refreshControl?.attributedTitle = NSAttributedString(string: "Pull To Refresh") 87  88                 self.tableView.reloadData() 89             }) 90         }) 91     } 92      93     // tableView dataSource 94     override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 95          96         return _dataSource.count 97     } 98      99     override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {100         101         let identifier = "cell"102         103         var cell = tableView .dequeueReusableCellWithIdentifier(identifier) as? UITableViewCell104         105         if cell == nil {106             107             cell = UITableViewCell(style: .Default, reuseIdentifier: identifier)108         }109         110         cell?.textLabel?.text = "\(_dataSource[indexPath.row])"111         112         return cell!113     }114 }

  1 #import "ViewController.h"  2   3 @interface ViewController ()  4 {  5     // 数据源  6     NSMutableArray * _dataSource;  7       8     // 风火轮  9     UIActivityIndicatorView * _aiv; 10 } 11  12 @end 13  14 @implementation ViewController 15  16 - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 17 { 18     return self; 19 } 20  21 - (void)viewDidLoad { 22     [super viewDidLoad]; 23     // Do any additional setup after loading the view, typically from a nib. 24      25     // 初始数据源 26     _dataSource = [[NSMutableArray alloc] init]; 27      28     // 基础数据 29     for (int i=0; i<3; i++) { 30          31         [_dataSource addObject:[NSString stringWithFormat:@"%d",i]]; 32     } 33      34     // 刷新控件 35     self.refreshControl = [[UIRefreshControl alloc] init]; 36     self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull To Refresh"]; 37     self.refreshControl.tintColor = [UIColor greenColor]; 38     [self.refreshControl addTarget:self action:@selector(refresh) forControlEvents:UIControlEventValueChanged]; 39  40     // 背景视图 41     UIView * tableFooterView = [[UIView alloc] init]; 42     tableFooterView.frame = CGRectMake(0, 0, self.view.bounds.size.width, 44); 43     tableFooterView.backgroundColor = [UIColor greenColor]; 44     self.tableView.tableFooterView = tableFooterView; 45      46     // 加载更多按扭 47     UIButton * loadMoreBtn = [[UIButton alloc] init]; 48     loadMoreBtn.frame = CGRectMake(0, 0, self.view.bounds.size.width, 44); 49     [loadMoreBtn setTitle:@"Load More" forState:UIControlStateNormal]; 50     [loadMoreBtn setTitleColor:[UIColor lightGrayColor] forState:UIControlStateNormal]; 51     [loadMoreBtn addTarget:self action:@selector(loadMore:) forControlEvents:UIControlEventTouchUpInside]; 52     [tableFooterView addSubview:loadMoreBtn]; 53  54     // 风火轮 55     _aiv = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]; 56     _aiv.center = loadMoreBtn.center; 57     [tableFooterView addSubview:_aiv]; 58 } 59  60 // 加载更多方法 61 - (void)loadMore:(UIButton *)sender 62 { 63     sender.hidden = YES; 64     [_aiv startAnimating]; 65      66     dispatch_async(dispatch_get_global_queue(0, 0), ^{ 67         68         [_dataSource addObject: [NSString stringWithFormat:@"%d", [_dataSource[_dataSource.count-1] intValue] + 1]]; 69          70         dispatch_async(dispatch_get_main_queue(), ^{ 71              72             sleep(1); 73              74             [_aiv stopAnimating]; 75             sender.hidden = NO; 76              77             [self.tableView reloadData]; 78         }); 79     }); 80 } 81  82 // 下拉刷新方法 83 - (void)refresh { 84      85     if (self.refreshControl.refreshing) { 86          87         self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Loading..."]; 88     } 89  90     dispatch_async(dispatch_get_global_queue(0, 0), ^{ 91          92     [_dataSource insertObject:[NSString stringWithFormat:@"%d", [_dataSource[0] intValue] -1] atIndex:0]; 93          94         dispatch_async(dispatch_get_main_queue(), ^{ 95              96             sleep(1); 97              98             [self.refreshControl endRefreshing]; 99             self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull To Refresh"];100             101             [self.tableView reloadData];102         });103     });104 }105 106 // tableView dataSource107 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {108 109     return _dataSource.count;110 }111 112 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {113     114     static NSString * identifier = @"cell";115     116     UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:identifier];117     118     if (cell == nil) {119         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];120     }121     122     cell.textLabel.text = _dataSource[indexPath.row];123     124     return cell;125 }126 127 @end