cell 控制子控件的顯示和隱藏

-(void)showRightDot:(BOOL)isShow
{
    UIImageView *dotView = [self.contentView viewWithTag:701];
    
    if (isShow) {
        
        if (!dotView) {
            dotView = [[UIImageView alloc] initWithFrame:CGRectMake(IPHONE_WIDTH - 3*kLeftInsect, CGRectGetHeight(self.frame)/2 - kRedDotWidth/2, kRedDotWidth, kRedDotWidth)];
            dotView.tag = 701;
            [dotView setCornerRadius:kRedDotWidth/2.0];
            dotView.backgroundColor = [UIColor redColor];
            [self.contentView addSubview:dotView];
        }
        
    }else{
        
        if (dotView) {
            [dotView removeFromSuperview];
        }
        
    }
    
    
}