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[英]I can't find how to get video duration in Google Photos API. Any clue?
[英]Xcode/iOS - Trying a simple print to console debug, can't get it to work. No clue how to find the issue
我一直在關注 Apple 網站上的 T 教程: https : //developer.apple.com/library/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Lesson5.html#//apple_ref/doc/uid/TP40015214-CH19-開關1
請耐心等待,因為我之前從未在 SO 上問過 iOS 開發問題(我才剛剛開始),但到目前為止,這是我的故事板:
觸摸(或在這種情況下,單擊)紅色方塊應該會向 Xcode 調試控制台打印一條消息(請參閱下面的代碼):
視圖控制器.swift:
import UIKit
class ViewController: UIViewController, UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
// MARK: Properties
@IBOutlet weak var nameTextField: UITextField!
@IBOutlet weak var mealNameLabel: UILabel!
@IBOutlet weak var photoImageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Handle the text field’s user input through delegate callbacks.
nameTextField.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: UITextFieldDelegate
func textFieldShouldReturn(textField: UITextField) -> Bool {
// Hide the keyboard.
textField.resignFirstResponder()
return true
}
func textFieldDidEndEditing(textField: UITextField) {
mealNameLabel.text = textField.text
}
// MARK: UIImagePickerControllerDelegate
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
// Dismiss the picker if the user canceled.
dismissViewControllerAnimated(true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
// The info dictionary contains multiple representations of the image, and this uses the original.
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
// Set photoImageView to display the selected image.
photoImageView.image = selectedImage
// Dismiss the picker.
dismissViewControllerAnimated(true, completion: nil)
}
// MARK: Actions
@IBAction func selectImageFromPhotoLibrary(sender: UITapGestureRecognizer) {
// Hide the keyboard.
nameTextField.resignFirstResponder()
// UIImagePickerController is a view controller that lets a user pick media from their photo library.
let imagePickerController = UIImagePickerController()
// Only allow photos to be picked, not taken.
imagePickerController.sourceType = .PhotoLibrary
// Make sure ViewController is notified when the user picks an image.
imagePickerController.delegate = self
presentViewController(imagePickerController, animated: true, completion: nil)
}
@IBAction func setDefaultLabelText(sender: UIButton) {
mealNameLabel.text = "Default Text"
}
}
評級控制.swift:
import UIKit
class RatingControl: UIView {
// MARK: Initialization
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
button.backgroundColor = UIColor.redColor()
button.addTarget(self, action: #selector(RatingControl.ratingButtonTapped(_:)), forControlEvents: .TouchDown)
addSubview(button)
}
override func intrinsicContentSize() -> CGSize {
return CGSize(width: 240, height: 44)
}
// MARK: Button Action
func ratingButtonTapped(button: UIButton) {
print("Button pressed 👍")
}
}
運行模擬器時,單擊紅色按鈕(設置為 RatingControl 類)不執行任何操作,也不會將任何內容打印到控制台。
我剛剛開始使用 Xcode/Swift,所以我不確定我是否提供了所有相關信息,所以如果我需要提供更多信息,請告訴我。 謝謝!
我遇到了與遵循相同教程完全相同的問題。
這就是您所需要的:查看 > 調試區域 > 激活控制台。 (cmd + shift + c)
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