1.设置一般View的背景
UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"imgName.png"]];
imgView.frame = self.view.bounds;
imgView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view insertSubview:imgView atIndex:0];
2.设置View的背景颜色，使用图片，效果和设置背景图片比较类似
[self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"imgName.png"]]];

3.设置UITableView的背景
UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"imgName.png"]];
imgView.frame = self.view.bounds;
imgView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.tableView setBackgroundView:imgView];

4.设置UITableView的cell颜色
//方法一：
cell.contentView.backgroundColor = [UIColor redColor];
//方法二：
UITableViewCell cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UIView bgview = [[UIView alloc]initWithFrame:CGRectMake(0,0,1,1)];
bgview.opaque = YES;
bgview.backgroundColor = [UIColor orangeColor];
[cell setBackgroundView:bgview];
//方法三：

• (void)tableView:(UITableView )tableView willDisplayCell:(UITableViewCell)cell forRowAtIndexPath:(NSIndexPath*)indexPath
  {
  cell.backgroundColor = [UIColor redColor];
  }