UITableView阴影

CGColorRef darkColor = [[UIColor blackColor] colorWithAlphaComponent:.5f].CGColor;
	CGColorRef lightColor = [UIColor clearColor].CGColor;
	
	//Footer shadow
	UIView *footerShadow = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 10)];
	
	CAGradientLayer *bottomShadow = [[[CAGradientLayer alloc] init] autorelease];
	bottomShadow.frame = CGRectMake(0,0, self.view.frame.size.width, 10);
	bottomShadow.colors = [NSArray arrayWithObjects:(id)darkColor, (id)lightColor, nil];
	footerShadow.alpha = 0.6;
	
	[footerShadow.layer addSublayer:bottomShadow];
	tb.tableFooterView = footerShadow;
	
	//Header shadow
	UIView *headerShadow = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 10)];
	
	CAGradientLayer *topShadow = [[[CAGradientLayer alloc] init] autorelease];
	topShadow.frame = CGRectMake(0, 0, self.view.frame.size.width, 10);
	topShadow.colors = [NSArray arrayWithObjects:(id)lightColor, (id)darkColor, nil];
	headerShadow.alpha = 0.3;
	
	[headerShadow.layer addSublayer:topShadow];
	tb.tableHeaderView = headerShadow;
	
	tb.contentInset = UIEdgeInsetsMake(-10, 0, 0, 0);

 

The problem is that this work only for plain style UITableViews that do not use thetableHeaderViews and tableFooterViews for anything else. If the view is using those (which it definitely is in case it is a grouped UITableView) do the following:

//replace
self.tableView.tableHeaderView = headerShadow;
//with
[self.tableView insertSubview:headerShadow aboveSubview:self.tableView.tableHeaderView];

//and
self.tableView.tableFooterView = footerShadow;
//with
[self.tableView insertSubview:footerShadow belowSubview:self.tableView.tableFooterView];

 

评论

1 楼 hhb19900618 2013-07-17  

你这个效果有渐变吗？