Question

我知道Stackoverflow上有类似的问题，但我没有找到任何帮助解决我遇到的问题。

我有这个JSON：

[{
"name": "Name0",
"services": [
    [{
        "Service": "Service00",
        "Description": "Desc00"
    }, {
        "Service": "Service01",
        "Description": "Desc01"
    }]
]
}, {
"name": "Name1",
"services": [
    [{
        "Service": "Service10",
        "Description": "Desc10"
    }]
]
}]

我用：

循环

$quoteJson = json_decode($quoteJson);

foreach($quoteJson as $mydata) {
    echo $mydata->name . "<br>";
        foreach($mydata->services as $key => $value)
            {
                echo $value[$key]->Service . "<br>";
                echo $value[$key]->Description . "<br>";
            }
 }

我得到的结果是：

Name0
Service00
Desc00

Name1
Service10
Desc10

我无法遍历服务元素，获取：

Name0
Service00
Desc00
Service01
Desc01

Name1
Service10
Desc10

Answer 1

由于某种原因，import UIKit import Vision import MobileCoreServices import AVFoundation import Photos class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate { var newMedia: Bool? @IBAction func captureImageButtonPressed(_ sender: Any) { //let imageName : String = "dolphin" //randomImageView.image = UIImage.init(named:imageName) if UIImagePickerController.isSourceTypeAvailable( UIImagePickerControllerSourceType.camera) { let imagePicker = UIImagePickerController() imagePicker.delegate = self imagePicker.sourceType = UIImagePickerControllerSourceType.camera imagePicker.mediaTypes = [kUTTypeImage as String] imagePicker.allowsEditing = false self.present(imagePicker, animated: true, completion: nil) newMedia = true } } @IBAction func classifyButtonPressed(_ sender: UIButton) { performVisionRequest() } @IBOutlet weak var randomImageView: UIImageView! @IBOutlet weak var classificationLabel: UILabel! override func viewDidLoad() { super.viewDidLoad() } override func viewDidLayoutSubviews() { super.viewDidLayoutSubviews() } func performVisionRequest() { let start = DispatchTime.now() let model = Resnet50() let request = VNImageRequestHandler(cgImage: randomImageView.image!.cgImage!, options: [:]) do { let m = try VNCoreMLModel(for: model.model) let coreMLRequest = VNCoreMLRequest(model: m) { (request, error) in guard let observation = request.results?.first as? VNClassificationObservation else { return } let stop = DispatchTime.now() let nanoTime = stop.uptimeNanoseconds - start.uptimeNanoseconds let timeInterval = Double(nanoTime) self.classificationLabel.text = "\(observation.identifier) (\(observation.confidence * 100)%) in \(timeInterval) seconds." } try request.perform([coreMLRequest]) } catch { print(error) } } func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { let mediaType = info[UIImagePickerControllerMediaType] as! NSString self.dismiss(animated: true, completion: nil) if mediaType.isEqual(to: kUTTypeImage as String) { let image = info[UIImagePickerControllerOriginalImage] as! UIImage randomImageView.image = image if (newMedia == true) { UIImageWriteToSavedPhotosAlbum(image, self, #selector(ViewController.image(image:didFinishSavingWithError:contextInfo:)), nil) } else if mediaType.isEqual(to: kUTTypeMovie as String) { // Code to support video here } } } @objc func image(image: UIImage, didFinishSavingWithError error: NSErrorPointer, contextInfo:UnsafeRawPointer) { if error != nil { let alert = UIAlertController(title: "Save Failed", message: "Failed to save image", preferredStyle: UIAlertControllerStyle.alert) let cancelAction = UIAlertAction(title: "OK", style: .cancel, handler: nil) alert.addAction(cancelAction) self.present(alert, animated: true, completion: nil) } } func imagePickerControllerDidCancel(_ picker: UIImagePickerController) { self.dismiss(animated: true, completion: nil) } }是数组中的数组。对您的代码进行了一些小改动：

services

现在又回来了：

NAME0
Service00
Desc00
Service01
Desc01
名1
Service10
Desc10

Answer 2

由于$ mydata-＆gt; services是多维数组，因此需要循环$ value变量。

$quoteJson = json_decode($quoteJson);

foreach($quoteJson as $mydata) {
    echo $mydata->name . "\n";

        foreach($mydata->services as $key => $value)
            {
                foreach($value as $k=>$v){ // loop the array
                    echo $v->Service . "\n";
                    echo $v->Description . "\n";
                }
            }
 }

Answer 3

输出不符合预期，因为您错过了内循环。下面的代码工作正常。

foreach($quoteJson as $mydata) {
echo $mydata->name . "<br>";
    foreach($mydata->services as $key => $value)
    {
        foreach($value as $innerdata){
            echo $innerdata->Service . "<br>";
            echo $innerdata->Description . "<br>";
        }
    }

}

JSON解码嵌套数组PHP循环

3 个答案: