Objective-C:如何为“正在加载..."设置动画UILabel 上的文本 [英] Objective-C: How to animate "Loading..." text on a UILabel

问题描述

在我的应用程序中，我需要在 UILabel 中重复显示正在加载"文本，如下所示:

In my app I need to display a "Loading" text in an UILabel, repeatedly as follows:

加载加载.加载中……加载中……加载中.正在加载..正在加载...

Loading Loading. Loading.. Loading... Loading Loading. Loading.. Loading...

我该怎么做?请问有什么建议吗?

How can I do it? Any suggestion, please?

推荐答案

您可以轻松地自己实现这样的行为 - 请参阅下面的示例.

You could easily implement such a behavior yourself – see my example below.

但是就像 trojanfoe 建议的那样，我宁愿使用一个不错的库，例如 MBProgressHUD 或 MarqueeLabel

But like trojanfoe suggested, I would rather use a nice library like MBProgressHUD or MarqueeLabel

- (void) updateLoadingLabel;
{
    if(self.loading) {
        if([self.labelLoading.text isEqualToString:@"Loading…"]) {
            self.labelLoading.text = @"Loading";
        } else {
            self.labelLoading.text = [NSString stringWithFormat:@"%@.",self.labelLoading.text];
        }
        [self performSelector:@selector(updateLoadingLabel) withObject:nil afterDelay:1.0]; //each second
    }

}

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