Question

我正在尝试使用下面的代码在swift中将图像设置为导航栏的标题。代码构建成功，但图像不显示。任何建议将不胜感激。

import UIKit

class FirstViewController: UIViewController { 

    @IBOutlet weak var navigationBar: UINavigationItem!
    var convoImage: UIImage!
    var convoImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.convoImage = UIImage(contentsOfFile: "conversation.png")
        self.convoImageView = UIImageView(image: self.convoImage)
        self.navigationBar.titleView = self.convoImageView
    }
}

Answer 1

设置navigationItem的titleView。

let image = UIImage(named: "image_name.png")
self.navigationItem.titleView = UIImageView(image: image)

在您的代码中替换以下行：

self.convoImage = UIImage(contentsOfFile: "conversation.png")

与

self.convoImage = UIImage(named: "conversation.png")

Answer 2

您应该设置convoImageView框架。

import UIKit

class FirstViewController: UIViewController { 

    @IBOutlet weak var navigationBar: UINavigationItem!
    var convoImage: UIImage!
    var convoImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.convoImage = UIImage(named: "conversation.png")
        self.convoImageView = UIImageView(image: self.convoImage)
        self.convoImageView.frame = CGRectMake(0,0,720,100)
        self.navigationBar.titleView = self.convoImageView
    }
}

将图像设置为导航栏标题

2 个答案: