我有以下代码添加边框颜色和投影到我的UITableViewCell的背景。我的问题是,这段代码会导致tableView本身的巨大滞后。UITableView滞后由于阴影和边界
请你可以告诉我如何优化我的代码,防止UITableView的滞后?
if ([cell viewWithTag:012] == nil && comment.isReply == NO) {
UIImageView *iv = [[[UIImageView alloc] initWithFrame:frame] autorelease];
[iv setImage:[UIImage imageNamed:@"paper"]];
[iv setTag:012];
[cell insertSubview:iv atIndex:0];
[iv.layer setBorderWidth:1.0];
[iv.layer setBorderColor:[[UIColor whiteColor] CGColor]];
[iv.layer setShadowColor:[[UIColor blackColor] CGColor]];
[iv.layer setShadowOffset:CGSizeMake(0, 1)];
[iv.layer setShadowOpacity:0.75];
}
else if ([cell viewWithTag:012] == nil && comment.isReply == YES) {
frame.origin.x += 35;
UIImageView *iv = [[[UIImageView alloc] initWithFrame:frame] autorelease];
[iv setImage:[UIImage imageNamed:@"paper"]];
[iv setTag:012];
[cell insertSubview:iv atIndex:0];
UIImage *arrow = [UIImage imageNamed:@"arrow"];
UIImageView *ivs = [[[UIImageView alloc] initWithFrame:CGRectMake(-12, ([cell frame].size.width/2) + ([arrow size].width/2) , arrow.size.width, arrow.size.height)] autorelease];
[cell addSubview:ivs];
[iv.layer setBorderWidth:1.0];
[iv.layer setBorderColor:[[UIColor whiteColor] CGColor]];
[iv.layer setShadowColor:[[UIColor blackColor] CGColor]];
[iv.layer setShadowOffset:CGSizeMake(0, 0)];
[iv.layer setShadowOpacity:0.75];
}
你究竟在哪里添加阴影?我的意思是你在UITableView数据源中这样做吗?如果是这样,你应该真的考虑创建一个自定义的UITableViewCell子类并在那里做自定义用户界面。 –
对不起,我没有说清楚,那是在cellForRowAtIndexPath方法。 –