#import "ViewController.h"  @interface ViewController () @end @implementation ViewController - (void)viewDidLoad {  [super viewDidLoad];  self.Logs = [[NSMutableArray alloc]init];//初始化數據  NSDate * date = [[NSDate alloc]init];//初始化日期  [self.Logs addObject:date];//把日期插入數據中  UIRefreshControl * rc = [[UIRefreshControl alloc]init];//初始化UIRefreshControl  rc.attributedTitle = [[NSAttributedString alloc]initWithString:@"下拉刷新"];//設置下拉框控件標簽  [rc addTarget:self action:@selector(refreshAction) forControlEvents:UIControlEventValueChanged];//添加下拉刷新事件  self.refreshControl = rc;  // Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning {  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated. } //下拉刷新事件 -(void)refreshAction {  if(self.refreshControl.refreshing)  {   self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"加載中"];//設置下拉框控件標簽   NSDate * date = [[NSDate alloc]init];   [self.Logs addObject:date];//每次刷新添加當前日期   [self.refreshControl endRefreshing];//結束刷新   self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"下拉刷新"];   [self.tableView reloadData];  } } #pragma mark -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {  return 1; } -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {  return [self.Logs count]; } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {  UITableViewCell * Cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];  NSDateFormatter * dateFormat =[[NSDateFormatter alloc]init];//NSDate的轉換類，可將NSDate轉換為其它格式，或者轉換為NSDate格式  [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss zzz"];//設定時間格式  Cell.textLabel.text = [dateFormat stringFromDate:[self.Logs objectAtIndex:indexPath.row]];  Cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;  return Cell; } @end