如何使用 UISegmentedControl 切换视图?

我正在尝试弄明白如何使用 UISegmentedControl 的不同状态来切换视图,类似于苹果在应用商店中在“最高付费”和“最高免费”之间切换时的做法。

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最简单的方法是有两个视图,您可以切换它们的可见性,以指示选择了哪个视图。下面是一些关于如何实现的示例代码,绝对不是处理视图的优化方法,而只是演示如何使用 UISegmentControl切换可见视图:

- (IBAction)segmentSwitch:(id)sender {
UISegmentedControl *segmentedControl = (UISegmentedControl *) sender;
NSInteger selectedSegment = segmentedControl.selectedSegmentIndex;


if (selectedSegment == 0) {
//toggle the correct view to be visible
[firstView setHidden:NO];
[secondView setHidden:YES];
}
else{
//toggle the correct view to be visible
[firstView setHidden:YES];
[secondView setHidden:NO];
}
}


当然,您可以进一步重构代码以隐藏/显示正确的视图。

或者,如果它是一个表,则可以重新加载该表,并在 cellForRowAtIndex 中,根据所选的段选项从不同的数据源填充该表。

一种想法是让带分段控件的视图拥有一个容器视图,您可以用不同的子视图填充这个容器视图(当分段被切换时,作为容器视图的唯一子视图添加)。您甚至可以为这些子视图使用单独的视图控制器,但是如果您需要的话,您必须转发像“ viewWillAppear”和“ viewWillDisaper”这样的重要方法(并且必须告诉它们使用哪个导航控制器)。

一般来说,这样做效果很好,因为您可以在 IB 中用容器布局主视图,子视图将填充容器允许它们占用的任何空间(确保正确设置了自动调整大小的掩码)。

在我的情况下,我的视图是相当复杂的,我不能只是改变不同视图的隐藏属性,因为它会占用太多的内存。

我已经尝试了几种解决方案,但没有一种对我有效,或者执行得不稳定,特别是在导航栏的 titleView 在推送/弹出视图时并不总是显示 SegmentedControl。

我发现了这篇关于这个问题的博客文章,它解释了如何以正确的方式做到这一点。看起来他在2010年 WWDC 的苹果工程师的帮助下想出了这个解决方案。

Http://redartisan.com/2010/6/27/uisegmented-control-view-switching-revisited

这个链接中的解决方案是我目前为止找到的最好的解决方案。稍微调整一下,在底部有一个标签栏也能正常工作

尝试使用 SNFSegmentedViewController,这是一个开放源码组件,通过像 UITabBarController这样的设置可以完成您正在寻找的工作。

分配,进去

 UISegmentedControl *lblSegChange;


- (IBAction)segValChange:(UISegmentedControl *) sender

申报 M

- (IBAction)segValChange:(UISegmentedControl *) sender
{


if(sender.selectedSegmentIndex==0)
{
viewcontroller1 *View=[[viewcontroller alloc]init];
[self.navigationController pushViewController:view animated:YES];
}
else
{
viewcontroller2 *View2=[[viewcontroller2 alloc]init];
[self.navigationController pushViewController:view2 animated:YES];
}
}

根据“ Ronnie Liew”的回答,我创造了这个:

//
//  ViewController.m
//  ResearchSegmentedView
//
//  Created by Ta Quoc Viet on 5/1/14.
//  Copyright (c) 2014 Ta Quoc Viet. All rights reserved.
//
#define SIZE_OF_SEGMENT 56
#import "ViewController.h"


@interface ViewController ()


@end


@implementation ViewController
@synthesize theSegmentControl;
UIView *firstView;
UIView *secondView;
CGRect leftRect;
CGRect centerRect;
CGRect rightRect;
- (void)viewDidLoad
{
[super viewDidLoad];
leftRect = CGRectMake(-self.view.frame.size.width, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
centerRect = CGRectMake(0, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);
rightRect = CGRectMake(self.view.frame.size.width, SIZE_OF_SEGMENT, self.view.frame.size.width, self.view.frame.size.height-SIZE_OF_SEGMENT);


firstView = [[UIView alloc] initWithFrame:centerRect];
[firstView setBackgroundColor:[UIColor orangeColor]];
secondView = [[UIView alloc] initWithFrame:rightRect];
[secondView setBackgroundColor:[UIColor greenColor]];
[self.view addSubview:firstView];
[self.view addSubview:secondView];


}


- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}


- (IBAction)segmentSwitch:(UISegmentedControl*)sender {
NSInteger selectedSegment = sender.selectedSegmentIndex;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.2];
if (selectedSegment == 0) {
//toggle the correct view to be visible
firstView.frame = centerRect;
secondView.frame = rightRect;
}
else{
//toggle the correct view to be visible
firstView.frame = leftRect;
secondView.frame = centerRect;
}
[UIView commitAnimations];
}
@end

一个迅速的版本:

@IBAction func segmentControlValueChanged(_ sender: UISegmentedControl) {


if segmentControl.selectedSegmentIndex == 0 {


// do something
} else {


// do something else
}
}

快速版:

父视图控制器负责设置每个子视图控制器的视图的大小和位置。子视图控制器的视图成为父视图控制器视图层次结构的一部分。

定义惰性属性:

private lazy var summaryViewController: SummaryViewController = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)


// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "SummaryViewController") as! SummaryViewController


// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)


return viewController
}()


private lazy var sessionsViewController: SessionsViewController = {
// Load Storyboard
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)


// Instantiate View Controller
var viewController = storyboard.instantiateViewController(withIdentifier: "SessionsViewController") as! SessionsViewController


// Add View Controller as Child View Controller
self.add(asChildViewController: viewController)


return viewController
}()

显示/隐藏子视图控制器:

private func add(asChildViewController viewController: UIViewController) {
// Add Child View Controller
addChildViewController(viewController)


// Add Child View as Subview
view.addSubview(viewController.view)


// Configure Child View
viewController.view.frame = view.bounds
viewController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]


// Notify Child View Controller
viewController.didMove(toParentViewController: self)
}


private func remove(asChildViewController viewController: UIViewController) {
// Notify Child View Controller
viewController.willMove(toParentViewController: nil)


// Remove Child View From Superview
viewController.view.removeFromSuperview()


// Notify Child View Controller
viewController.removeFromParentViewController()
}

管理分段控制录音事件

private func updateView() {
if segmentedControl.selectedSegmentIndex == 0 {
remove(asChildViewController: sessionsViewController)
add(asChildViewController: summaryViewController)
} else {
remove(asChildViewController: summaryViewController)
add(asChildViewController: sessionsViewController)
}
}

当然,您也可以在子视图控制器类中使用:

override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
print("Summary View Controller Will Appear")
}


override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
print("Summary View Controller Will Disappear")
}

参考文献: Https://cocoacasts.com/managing-view-controllers-with-container-view-controllers/