[摘要]本文是對實現tableview的下拉刷新的講解，對學習IOS蘋果軟件開發有所幫助,與大家分享。 實現tableview的下拉刷新
推薦第三方下拉刷新代碼http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
tableview滑動就會觸發這個方法?

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
 {
 //當tableview下拉到最後一行的時候才觸發
 if (indexPath.row == self.m_data.count - 1) {
 
 //定義一個UIView
UIView *footSpinnerView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 60.0f)];

//頂一個有刷新圖標的view
 UIActivityIndicatorView *activity = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(130.0f, 0.0f, 60.0f, 60.0f)];
activity.color = [UIColor redColor];
[activity startAnimating];//啟動有刷新圖標的view
 
 footSpinnerView.backgroundColor = [UIColor grayColor];
[footSpinnerView addSubview:activity];

 //設置footerview
 self.myTableView.tableFooterView = footSpinnerView;

 // self.myTableView.tableHeaderView = footSpinnerView;
 
 dispatch_queue_t queue = dispatch_queue_create("my queue", nil);
 
 //在後台線程添加數據
dispatch_async(queue, ^(void){

 [self.m_data addObject:@"1000"];
 [self.m_data addObject:@"1001"];
 [self.m_data addObject:@"1002"];
 [self.m_data addObject:@"1003"];
 [self.m_data addObject:@"1004"];
 
 });
 
 //添加完數據就重新加載數據
 dispatch_async(queue, ^(void) {
 
 sleep(2);
 dispatch_sync(dispatch_get_main_queue(), ^(void){
 
 [self.myTableView reloadData];
 });
 });
 
 // [self.myTableView reloadData];
 dispatch_release(queue);
 [footSpinnerView release];
 [activity release];
 }
 }