I'd like to have gradient background color behind of a table view, which has transparent navigation bar.
Codes as following, but gradient color doesn't show up.
Tried code part of CAGradientLayer in a simple normal UIViewController, it does work.
Why it doesn't work in UITableViewController?
- (void)viewDidLoad
{
[super viewDidLoad];
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage = [UIImage new];
self.navigationController.navigationBar.translucent = YES;
self.data = @[@"Xrsi", @"Liang", @"La", @"Dn", @"Piao", @"69", @"Sun", @"Mon", @"Xrsi", @"Dn", @"Lan", @"Liang", @"Piao", @"69", @"Sun", @"Mon"];
UIColor * baseColor = [[UIColor alloc] initWithRed:0.016 green:0.729 blue:0.933 alpha:1.000];
CGFloat hue;
CGFloat saturation;
CGFloat brightness;
CGFloat alpha;
self.cellColors = [[NSMutableArray alloc] initWithObjects:baseColor, nil];
if ([baseColor getHue:&hue saturation:&saturation brightness:&brightness alpha:&alpha]) {
for (NSUInteger i = 0; i < [self.data count]; i ++) {
brightness = brightness - 0.025;
UIColor * newColor = [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:alpha];
[self.cellColors addObject:newColor];
}
}
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
UIColor * bottomColor = [self.cellColors lastObject];
CAGradientLayer * gradientLayer = [CAGradientLayer layer];
gradientLayer.frame = self.view.frame;
gradientLayer.colors = [NSArray arrayWithObjects:(id)baseColor.CGColor, (id)bottomColor.CGColor, nil];
[self.view.layer insertSublayer:gradientLayer atIndex:0];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];
cell.backgroundColor = self.cellColors[indexPath.row];
cell.textLabel.text = self.data[indexPath.row];
cell.textLabel.textColor = [UIColor whiteColor];
return cell;
}
