[英]Unable to make Navigation Bar totally transparent in iOS6
我使用以下代码使我的导航栏在iOS5中透明:
const float colorMask[6] = {222, 255, 222, 255, 222, 255};
UIImage *img = [[UIImage alloc] init];
UIImage *maskedImage = [UIImage imageWithCGImage: CGImageCreateWithMaskingColors(img.CGImage, colorMask)];
[self.navigationController.navigationBar setBackgroundImage:maskedImage forBarMetrics:UIBarMetricsDefault];
升级到iOS6并且导航栏仍然是透明的,但现在它下面有一条细黑线。 如何使导航栏完全透明?
我也尝试了以下所有方法:
self.navigationController.navigationBar.translucent = YES;
self.navigationController.navigationBar.opaque = YES;
self.navigationController.navigationBar.tintColor = [UIColor clearColor];
self.navigationController.navigationBar.backgroundColor = [UIColor clearColor];
[self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setBarStyle:UIBarStyleBlackTranslucent];
[[UINavigationBar appearance] setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
提前致谢。
解决了。 iOS6为导航栏添加了阴影。 所以我在iOS5上使用的屏蔽代码仍然可以正常工作 - 我只需要添加
if ([self.navigationController.navigationBar respondsToSelector:@selector(shadowImage)])
{
[self.navigationController.navigationBar setShadowImage:[[UIImage alloc] init]];
}
摆脱投影。
self.navigationController.navigationBar.translucent = YES; // Setting this slides the view up, underneath the nav bar (otherwise it'll appear black)
const float colorMask[6] = {222, 255, 222, 255, 222, 255};
UIImage *img = [[UIImage alloc] init];
UIImage *maskedImage = [UIImage imageWithCGImage: CGImageCreateWithMaskingColors(img.CGImage, colorMask)];
[self.navigationController.navigationBar setBackgroundImage:maskedImage forBarMetrics:UIBarMetricsDefault];
//remove shadow
[[UINavigationBar appearance] setShadowImage: [[UIImage alloc] init]];
if ([self.navigationController.navigationBar respondsToSelector:@selector(shadowImage)])
{
[self.navigationController.navigationBar setShadowImage:[[[UIImage alloc] init] autorelease]];
// autorelease is necessary, or else [[UIImage alloc] init]'s retainCount is 2.
}
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