如何在iOS 7中制作完全透明的导航栏
如何在iOS 7中制作完全透明的导航栏
提问于 2013-09-29 20:32:38
我希望我的应用程序中的UINavigationBar是完全透明的，并与其直接下方的视图控制器同花顺。然而，我唯一能找到的代码使它透明但不透明。我知道这可以在iOS 7中完成，因为它在notes应用程序中使用。我的问题是，他们用来做这件事的代码是什么？
回答 8
Stack Overflow用户
回答已采纳
发布于 2013-10-11 16:41:57
来自这个答案
[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage = [UIImage new];
self.navigationController.navigationBar.translucent = YES;
self.navigationController.view.backgroundColor = [UIColor clearColor];
self.navigationController.navigationBar.backgroundColor = [UIColor clearColor];此外，正如Josh在评论中所建议的那样，将这个栏恢复到默认状态：
[self.navigationController.navigationBar setBackgroundImage:nil
forBarMetrics:UIBarMetricsDefault];Stack Overflow用户
发布于 2015-08-11 08:04:01
For Swift3和Swift4
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = trueFor Swift2.2
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), forBarMetrics: .Default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.translucent = trueFor Objective C
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage = [UIImage new];
self.navigationController.navigationBar.translucent = YES;Stack Overflow用户
发布于 2014-12-22 22:26:28
作为目标的独立解决方案-C类：
UINavigationController+TransparentNavigationController.h
@interface UINavigationController (TransparentNavigationController)
- (void)presentTransparentNavigationBar;
- (void)hideTransparentNavigationBar;
@endUINavigationController+TransparentNavigationController.m
#import "UINavigationController+TransparentNavigationController.h"
@implementation UINavigationController (TransparentNavigationController)
- (void)presentTransparentNavigationBar
{
[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationBar setTranslucent:YES];
[self.navigationBar setShadowImage:[UIImage new]];
[self setNavigationBarHidden:NO animated:YES];
}
- (void)hideTransparentNavigationBar
{
[self setNavigationBarHidden:YES animated:NO];
[self.navigationBar setBackgroundImage:[[UINavigationBar appearance] backgroundImageForBarMetrics:UIBarMetricsDefault] forBarMetrics:UIBarMetricsDefault];
[self.navigationBar setTranslucent:[[UINavigationBar appearance] isTranslucent]];
[self.navigationBar setShadowImage:[[UINavigationBar appearance] shadowImage]];
}
@end现在，您可以在UIViewController中导入类别并调用导航控制器上的方法--例如：
#import "UINavigationController+TransparentNavigationController.h"
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController presentTransparentNavigationBar];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.navigationController hideTransparentNavigationBar];
}以及Swift中的类似解决方案
import Foundation
import UIKit
extension UINavigationController {
public func presentTransparentNavigationBar() {
navigationBar.setBackgroundImage(UIImage(), forBarMetrics:UIBarMetrics.Default)
navigationBar.translucent = true
navigationBar.shadowImage = UIImage()
setNavigationBarHidden(false, animated:true)
}
public func hideTransparentNavigationBar() {
setNavigationBarHidden(true, animated:false)
navigationBar.setBackgroundImage(UINavigationBar.appearance().backgroundImageForBarMetrics(UIBarMetrics.Default), forBarMetrics:UIBarMetrics.Default)
navigationBar.translucent = UINavigationBar.appearance().translucent
navigationBar.shadowImage = UINavigationBar.appearance().shadowImage
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/19082963
复制相关文章
相似问题
腾讯云开发者
