프로그래밍 방식으로 고정 공간과 유연한 스페이스 바 버튼 항목을 만드는 방법은 무엇입니까?

프로그래밍 방식으로 고정 공간과 유연한 스페이스 바 버튼 항목을 만드는 방법은 무엇입니까?

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UIBarButtonItems프로그래밍 방식으로 만들고이 고정 공간 항목을 버튼 사이에 배치 하고 싶습니다 .

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UIBarButtonItem *fixedItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
fixedItem.width = 20.0f; // or whatever you want

UIBarButtonItem *flexibleItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

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빠른

// Fixed Space
let fixedSpace: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
fixedSpace.width = 20.0

// Flexible Space
let flexibleSpace: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)

---

UIBarButtonItem *todayItem = [[UIBarButtonItem alloc] initWithTitle:@"Today" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)];
todayItem.tag = 2;

UIBarButtonItem *cashItem = [[UIBarButtonItem alloc] initWithTitle:@"Cash" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)];
cashItem.tag = 3;

UIBarButtonItem *creditItem = [[UIBarButtonItem alloc] initWithTitle:@"Credit" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)];
creditItem.tag = 4;

UIBarButtonItem *allItem = [[UIBarButtonItem alloc] initWithTitle:@"All" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)];
allItem.tag = 1;

UIBarButtonItem *returnItem = [[UIBarButtonItem alloc] initWithTitle:@"Return" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)];
returnItem.tag = 5;

UIBarButtonItem *fixedItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
[fixedItem setWidth:455.0f];

UIBarButtonItem *fixed2Item = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
[fixed2Item setWidth:37.0f];

UIBarButtonItem *flexibleItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

[self.toolbar setItems:@[fixed2Item, returnItem, creditItem, cashItem, fixedItem, todayItem, flexibleItem, allItem] animated:NO];

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ViewDidLoad에서 :

    //toolbar
UIToolbar *toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 416, 320, 44)];

// bar btns
UIBarButtonItem *backBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRewind target:self action:@selector(goBack)];
UIBarButtonItem *forwardBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFastForward target:self action:@selector(goForward)];
UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
UIBarButtonItem *bookmarkBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(bookmark)];
UIBarButtonItem *refreshBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(refresh)];
UIBarButtonItem *stopLoadingBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemStop target:self action:@selector(stopLoading)];

// add btns to the bar
[toolBar setItems:[NSMutableArray arrayWithObjects:bookmarkBtn,backBtn,forwardBtn,flexibleSpace,refreshBtn,stopLoadingBtn, nil]];

// adds the toobar to the view
[self.view addSubview:toolBar];

각 버튼의 동작도 잊지 마십시오 (이 예에서는 UIWebView).

    -(void)goBack
{
    [_webView goBack];
}

-(void)goForward
{
    [_webView goForward];
}

기타

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Swift 3에서는 UIBarButtonItem이라는 이니셜 라이저가 init(barButtonSystemItem:target:action:)있습니다. init(barButtonSystemItem:target:action:)다음과 같은 선언이 있습니다.

convenience init(barButtonSystemItem systemItem: UIBarButtonSystemItem, target: Any?, action: Selector?)

지정된 시스템 항목을 포함하는 새 항목을 초기화합니다.

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UIBarButtonSystemItem를 포함하여 대부분의 경우 제공을 열거 done, play, add또는 cancel. 그러나 필요에 따라 flexibleSpace또는 fixedSpace경우를 선택할 수도 있습니다 .

flexibleSpace case에는 다음과 같은 선언이 있습니다.

다른 항목 사이에 추가 할 공백. 공간은 다른 항목간에 균등하게 분배됩니다. 이 값을 설정하면 다른 항목 속성이 무시됩니다.

fixedSpace case에는 다음과 같은 선언이 있습니다.

Blank space to add between other items. Only the width property is used when this value is set.

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Therefore, you can create fixed and flexible space bar button items programmatically as shown below:

let flexibleSpace = UIBarButtonItem(
    barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace,
    target: nil,
    action: nil
)

let fixedSpace = UIBarButtonItem(
    barButtonSystemItem: UIBarButtonSystemItem.fixedSpace,
    target: nil,
    action: nil
)
fixedSpace.width = 30 // Set width with the appropriate value

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As an example, the Playground code below shows how to add a bottom bar with two centered play and pause bar button items separated by a fixed space of 30 in a view controller:

import PlaygroundSupport
import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        view.backgroundColor = .white
        title = "Home"
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        // Show navigation controller’s built-in toolbar
        navigationController?.setToolbarHidden(false, animated: false)

        // Create UIBarButtonItems
        let flexibleSpace1 = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        let playItem = UIBarButtonItem(barButtonSystemItem: .play, target: self, action: nil)
        let fixedSpace = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
        fixedSpace.width = 30
        let pauseItem = UIBarButtonItem(barButtonSystemItem: .pause, target: self, action: nil)
        let flexibleSpace2 = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)

        // Set the view controller toolbar items
        setToolbarItems([flexibleSpace1, playItem, fixedSpace, pauseItem, flexibleSpace2], animated: false)
    }

    override func viewWillDisappear(_ animated: Bool) {
        // Hide navigation controller’s built-in toolbar
        navigationController?.setToolbarHidden(true, animated: true)

        super.viewWillDisappear(animated)
    }

}

let viewController = ViewController()
let navigationController = UINavigationController(rootViewController: viewController)
PlaygroundPage.current.liveView = navigationController

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Preview your view controller in the Playground assistant editor using View ▸ Assistant Editor ▸ Show Assistant Editor

참고URL : https://stackoverflow.com/questions/3663058/how-to-create-fixed-space-and-flexible-space-bar-button-items-programmatically