Customize UITableViewCell Issue

I have customize the UITableViewCell. I have custom progress bar(a UIView) on it, 开发者_Go百科but when I select the cell, the custom progress bar did disappear.

cell.progressView.backgroundColor = [UIColor colorWithRed:0.85 green:0.85 blue:0.85 alpha:1.0];
cell.progressView.layer.cornerRadius = 6.0;