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UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];

    backgroundView.backgroundColor = [UIColor clearColor];

    UIView *timeVLine = [[UIView alloc] initWithFrame:CGRectMake(33, 0, 0.4, 100)];

    [backgroundView addSubview:timeVLine];

    timeVLine.backgroundColor = [UIColor redColor];

    timeVLine.autoresizingMask = UIViewAutoresizingFlexibleHeight;

    tableView.backgroundView = backgroundView;

注意：backgroundView和timeVLine等高

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