界面 显示不显示到 0 解决方法

[[NSRunLoopmainRunLoop] runUntilDate:[NSDatedateWithTimeIntervalSinceNow:0.5]];

例:

_cleaningOrScaningLabel.text = @"正在清理中...";

    percentNumber--;

    

    _cleanTipSizeLabel.text = [NSString stringWithFormat:@"%d",percentNumber];

    [self refrushCleanTipBjViewFrame];

    if (percentNumber == 0) {

        [[NSRunLoop mainRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.5]];

}