Question

我是SWIFT的新手，我做了一些示例应用程序。

我唯一无法解决的问题是让我的图像显示在Detail Scene（DetailViewController）上。

在我的MasterViewController文件中，我有这个来获取我的multiData文件：

...

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "showData" {

        if let indexPath = self.tableView.indexPathForSelectedRow {

            let controller = (segue.destinationViewController as! UINavigationController).topViewController as! DetailViewController

            controller.detailItem = self.multiData[indexPath.section][indexPath.row]
            controller.navigationItem.leftBarButtonItem = self.splitViewController?.displayModeButtonItem()
            controller.navigationItem.leftItemsSupplementBackButton = true
        }
    }
}

// Here I get my multiData
func createData() {

    var first: [Dictionary<String,String>] = []
    var second: [Dictionary<String,String>] = []

    dataSections = ["First Data", "Second Data"]

    first.append(["name": "someName", "image": "somePngFile", "someData": "someText"])        
    second.append(["name": "someName", "image": "somePngFile", "someData": "someText"])

    multiData = [first, second]
}

DetailViewController：

...

@IBOutlet weak var label: UILabel!    
@IBOutlet weak var text: UITextView!
@IBOutlet weak var image: UIImageView!

...

func configureView() {        

    if let detail = self.detailItem {

        if let labelTitle = label {

            labelTitle.text = detail["name"] as! String!
        }

        if let textData = text {

            textData.text = detail["someData"] as! String!
        }

        // This obvious doesn't work
        if let imageFile = image {

            imageFile.image = detail["image"] as! UIImage!
        }
    }
}

所以，我的问题是如何从detail["image"]获取图片？

Answer 1

我假设detail["image"]中包含的图像在您的应用程序包中（即：不是来自HTTP URL的图像）。因此，您应该使用init(named:) constructor from UIImage加载图片。这样的事情：

if let myImage = UIImage(named: detail["image"]) {
    myImageView.image = myImage
}

修改：

此外，您的代码还可以更好地管理configureView中的选项和演员：

func configureView() {
    if let detail = self.detailItem {

        if let labelTitle = detail["name"] as? String {
            myLabel.text = labelTitle
        }

        if let textViewContent = detail["someData"] as? String {
            myTextView.text = textViewContent
        }

        if let myImageName = detail["image"] as? String {
            if let myImage = UIImage(named: myImageName) {
                myImageView.image = myImage
            }
        }
    }
}

在UISplitViewController上显示图像

1 个答案: