我有一个应用程序,有时需要它的导航栏融入内容。
有人知道怎么去掉或者改变这个烦人的小条的颜色吗?
在下图中,我说的是根视图控制器下面1px的高度线
我有一个应用程序,有时需要它的导航栏融入内容。
有人知道怎么去掉或者改变这个烦人的小条的颜色吗?
在下图中,我说的是根视图控制器下面1px的高度线
当前回答
两条线的解决方案对我来说很有效。尝试在ViewDidLoad方法中添加这个:
navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
self.extendedLayoutIncludesOpaqueBars = true
其他回答
pxpgraphics对Swift 3.0的回答。
import Foundation
import UIKit
extension UINavigationBar {
func hideBottomHairline() {
let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)
navigationBarImageView!.isHidden = true
}
func showBottomHairline() {
let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)
navigationBarImageView!.isHidden = false
}
private func hairlineImageViewInNavigationBar(view: UIView) -> UIImageView? {
if view is UIImageView && view.bounds.height <= 1.0 {
return (view as! UIImageView)
}
let subviews = (view.subviews as [UIView])
for subview: UIView in subviews {
if let imageView: UIImageView = hairlineImageViewInNavigationBar(view: subview) {
return imageView
}
}
return nil
}
}
extension UIToolbar {
func hideHairline() {
let navigationBarImageView = hairlineImageViewInToolbar(view: self)
navigationBarImageView!.isHidden = true
}
func showHairline() {
let navigationBarImageView = hairlineImageViewInToolbar(view: self)
navigationBarImageView!.isHidden = false
}
private func hairlineImageViewInToolbar(view: UIView) -> UIImageView? {
if view is UIImageView && view.bounds.height <= 1.0 {
return (view as! UIImageView)
}
let subviews = (view.subviews as [UIView])
for subview: UIView in subviews {
if let imageView: UIImageView = hairlineImageViewInToolbar(view: subview) {
return imageView
}
}
return nil
}
}
这里有另一个选择-我认为这只适用于你不需要半透明的导航栏(我没有)。我只是在导航栏的底部添加了一个1像素高的UIView(在导航栏下面1像素),颜色与我的导航栏相同:
UIView *view = [[UIView alloc] init];
[view setBackgroundColor:self.navigationController.navigationBar.barTintColor];
[self.navigationController.navigationBar addSubview:view];
[view mas_makeConstraints:^(MASConstraintMaker *make) {
make.height.equalTo(@(1.0f));
make.leading.trailing.equalTo(self.navigationController.navigationBar);
make.bottom.equalTo(self.navigationController.navigationBar).offset(1.0f);
}];
我正在使用砌体添加约束。
在Swift 3中,我们就是这样做的
对于任何视图控制器:
navigationBar.shadowImage = UIImage()
setBackgroundImage(UIImage(), for: .default)
对于整个应用程序:
UINavigationBar.appearance().setBackgroundImage(UIImage(),barMetrics: .Default)
UINavigationBar.appearance().shadowImage = UIImage()
我刚刚为这个创建了一个扩展…关于格式的问题很抱歉(这是我的第一个答案)。
用法:
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.hideShadow = true
}
扩展:
UINavigationController.swift
// Created by Ricardo López Rey on 16/7/15.
import Foundation
struct UINavigationControllerExtension {
static var hideShadowKey : String = "HideShadow"
static let backColor = UIColor(red: 247/255, green: 247/255, blue: 248/255, alpha: 1.0)
}
extension UINavigationController {
var hideShadow : Bool {
get {
if let ret = objc_getAssociatedObject(self, &UINavigationControllerExtension.hideShadowKey) as? Bool {
return ret
} else {
return false
}
}
set {
objc_setAssociatedObject(self,&UINavigationControllerExtension.hideShadowKey,newValue, objc_AssociationPolicy(OBJC_ASSOCIATION_RETAIN_NONATOMIC))
if newValue {
self.navigationBar.setBackgroundImage(solidImage(UINavigationControllerExtension.backColor), forBarMetrics: UIBarMetrics.Default)
self.navigationBar.shadowImage = solidImage(UIColor.clearColor())
} else {
self.navigationBar.setBackgroundImage(nil, forBarMetrics: UIBarMetrics.Default)
}
}
}
private func solidImage(color: UIColor, size: CGSize = CGSize(width: 1,height: 1)) -> UIImage {
var rect = CGRectMake(0, 0, size.width, size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
UIRectFill(rect)
var image: UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
}
在子视图中找到发际线的一个很好的简短Swift函数是:
func findHairLineInImageViewUnder(view view: UIView) -> UIImageView? {
if let hairLineView = view as? UIImageView where hairLineView.bounds.size.height <= 1.0 {
return hairLineView
}
if let hairLineView = view.subviews.flatMap({self.findHairLineInImageViewUnder(view: $0)}).first {
return hairLineView
}
return nil
}