如何在QLPreviewController中设置半透明属性我已经尝试过以下代码,但它无法正常工作
QLPreviewController *previewer = [[QLPreviewController alloc] init];
// Set data source
[previewer setDataSource:self];
[previewer setDelegate:self];
previewer.edgesForExtendedLayout = UIRectEdgeNone;
[previewer setCurrentPreviewItemIndex:index];
[self.navigationController.navigationBar setTranslucent:NO];
[self.navigationController setToolbarHidden:NO];
[[self navigationController] pushViewController:previewer animated:YES];
由于
答案 0 :(得分:3)
您可以使用:
UINavigationBar *navBar = [UINavigationBar appearanceWhenContainedIn:[QLPreviewController class], nil];
[navBar setBackgroundImage:[UIImage imageNamed:@"navigation-bg-ios7.png"] forBarMetrics:UIBarMetricsDefault];
我已经尝试过它并且有效。
答案 1 :(得分:2)
import QuickLook
UINavigationBar.appearance(whenContainedInInstancesOf: [QLPreviewController.self]).setBackgroundImage(UIImage.init(color: primaryColor), for: .default)
这是扩展名中带有颜色功能的图像
extension UIImage {
//image with color
convenience init?(color: UIColor) {
let rect = CGRect(x: 0.0, y: 0.0, width: 1.0, height: 1.0)
UIGraphicsBeginImageContext(rect.size)
let path = UIBezierPath(rect: rect)
color.setFill()
path.fill()
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
self.init(cgImage: image!.cgImage!)
}
}
答案 2 :(得分:0)
[[UINavigationBar appearance] setBarTintColor:[UIColor redColor]];
注意:仅适用于iOS7