iOS開源項目：SVPullToRefresh

SVPullToRefresh也是一個下拉刷新的項目：https://github.com/samvermette/SVPullToRefresh

 

SVPullToRefresh 允許你通過一行代碼把下拉刷新添加至UIScrollView子類別，不需要依賴委托或者子類化UITableViewController。另外，該項目支持簡單自定義文本、箭頭的外觀。

這些UIScrollView類別讓下拉刷新和UIScrollView的無限滾動變得非常簡單。

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupDataSource];
    
    __weak SVViewController *weakSelf = self;
    
    // setup pull-to-refresh
    [self.tableView addPullToRefreshWithActionHandler:^{
        [weakSelf insertRowAtTop];
    }];

}

- (void)insertRowAtTop {
    __weak SVViewController *weakSelf = self;

    int64_t delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [weakSelf.tableView beginUpdates];
        [weakSelf.dataSource insertObject:[NSDate date] atIndex:0];
        [weakSelf.tableView insertRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:0 inSection:0]] withRowAnimation:UITableViewRowAnimationBottom];
        [weakSelf.tableView endUpdates];
        
        [weakSelf.tableView.pullToRefreshView stopAnimating];
    });
}