Question

如果UIRefreshControl以编程方式启动，（beginRefreshing然后endRefreshing）当它不可见时，则在下次手动刷新时UIRefreshControl动画中会有连续的闪烁。

在UITableViewController子类中添加此方法，并在2秒后执行pull刷新，您将看到闪烁

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    UIRefreshControl * refreshControl = [[UIRefreshControl alloc] init];

    self.refreshControl = refreshControl;

    [self.refreshControl beginRefreshing];

    double delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, 
    (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){

        [self.refreshControl endRefreshing];
    });
}

如何避免这种闪烁？

Answer 1

将您的代码放在viewDidLoad或viewWillAppear中，而不是viewDidAppear。

另外，你能告诉我将代码放在viewDidAppear方法中的原因，而不是viewDidLoad或viewWillAppear吗？

UILefreshControl在iOS7中闪烁

1 个答案: