Menu
Data Model
class dataImage {
var userId: String
var value: Double
var photo: UIImage?
var croppedPhoto: UIImage?
init(userId:String, value: Double, photo: UIImage?, croppedPhoto: UIImage?){
self.userId = userId
self.value = value
self.photo = photo
self.photo = croppedPhoto
}
}
View Controller
var photos = [DKAsset]() //image source
var datas = [dataImage]()
var counter = 0
for asset in photos{
asset.fetchOriginalImageWithCompleteBlock({ image, info in // move image from photos to datas
let images = image
let data1 = dataImage(userId: "img\(counter+1)", value: 1.0, photo: images, croppedPhoto: images)
self.datas += [data1]
counter++
})
}
from that code, let's say i have 5 datas:
- dataImage(userId: "img1", value: 1.0, photo: images, croppedPhoto:
images)
- dataImage(userId: "img2", value: 1.0, photo: images, croppedPhoto:
images)
- dataImage(userId: "img3", value: 1.0, photo: images, **croppedPhoto:
images**)
- dataImage(userId: "img4", value: 1.0, photo: images, croppedPhoto:
images)
- dataImage(userId: "img5", value: 1.0, photo: images, croppedPhoto:
images)
How to change/update img3's croppedImage value?
934
To replace an element with another value in Swift Array, get the index of the match of the required element to replace, and assign new value to the array using the subscript.
To change the value of all elements in an array:Use the forEach() method to iterate over the array. The method takes a function that gets invoked with the array element, its index and the array itself. Use the index of the current iteration to change the corresponding array element.
The map() Function in Swift. In Swift, you can use the built-in map() function to modify each element in a collection. The map() function loops through the collection, applying a function for each element. The map() function always returns an array where the transformed values are.
self.datas[2] = dataImage(userId: "img6", value: 1.0, photo: images, croppedPhoto: images)
This will replace the 3rd object in the array with a new one.
or
self.datas[2].value = 2.0
This will change the value of the dataImage object with userId "img3".
Does this answer your question?
If you need to search for a specific value in userId, then you are far better of with a dictionary (associated array) rather than an (indexed) array.
var datas = [String, dataImage]()
...
self.datas["img\(counter+1)"] = ...
And you access it the same way.
self.datas["img3"].value = 2.0
And please rename the class imageData into ImageData. Class names start with capitals.
64
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
