我需要存储颜色并在其他viewController中显示颜色。当我保存时，像这样保存UIDynamicSystemColor：0x600001127620;名称= systemBlueColor
有了这些数据，我如何显示颜色，它是领域对象中的字符串类型。
我怎样才能做到这一点？
CategoryForm：-
import RealmSwift
class CategoryForm : Object {
@objc dynamic var categoryName : String = ""
@objc dynamic var categoryColor : String = ""
}
类别SaveColor：-
struct CategoryVaraible {
static var categoryArray : Results<CategoryForm>?
}
class CategoryDetailsViewController : UIViewController {
var categories = CategoryVaraible.categoryArray
var color = [UIColor.secondarySystemFill,UIColor.systemRed,UIColor.systemPink,UIColor.systemOrange,UIColor.systemYellow,UIColor.systemGreen,UIColor.systemBlue,UIColor.systemPurple]
var colorSelected : UIColor!
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = self.collectionView.dequeueReusableCell(withReuseIdentifier: "ColorViewCell", for: indexPath) as! ColorViewCell
cell.backgroundColor = color[indexPath.row]
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let item = indexPath.row
if item == 0 {
colorSelected = UIColor.secondarySystemFill
}else if item == 1 {
colorSelected = UIColor.systemRed
}else if item == 2 {
colorSelected = UIColor.systemPink
}else if item == 3 {
colorSelected = UIColor.systemOrange
}else if item == 4 {
colorSelected = UIColor.systemYellow
}else if item == 5 {
colorSelected = UIColor.systemGreen
}else if item == 6 {
colorSelected = UIColor.systemBlue
}else if item == 7 {
colorSelected = UIColor.systemPurple
}
}
//Here Saving
@IBAction func saveAction(_ sender: UIButton) {
let newArray = CategoryForm()
newArray.categoryName = categoryName.text!
newArray.categoryColor = "\(colorSelected!)"
self.saveItems(category: newArray)
self.navigationController?.popViewController(animated: true)
}
func saveItems(category: CategoryForm) {
do{
try realm.write {//Save/Create
realm.add(category)
}
}catch {
print("Error in saving \(error)")
}
}
保存后在这里显示保存的颜色
显示ViewController：-
var categories = CategoryVaraible.categoryArray
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return categories?.count ?? 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCell(withIdentifier: "CategoryCell", for: indexPath) as! CategoryCell
let colorStr = categories?[indexPath.row].categoryColor
<UIDynamicSystemColor: 0x600001127620; name = systemBlueColor>
cell.circleImage.backgroundColor = UIImage(name: colorStr as! String)//Here We need to display color
return cell
}
最佳答案
如果您不关心暗模式和系统颜色，我将添加几个简单的扩展，以将UIColor序列化/反序列化为标准值（例如json中的ARGB或更好的Int十六进制）。
多种解决方案，例如：https://stackoverflow.com/a/19072934/691977
然后只存储单个String或Int值。
读取时，有一个访问器方法可将存储的值转换为UIInt。
就像是：
extension UIColor {
init(hex: UInt32){
...
}
var hex: UInt32 {
...
}
}
class CategoryForm : Object {
@objc dynamic var categoryName : String = ""
@objc dynamic var categoryColor : UInt32 = 0
var color: UIColor? {
get {
return UIColor(hex: self.categoryColor)
}
set {
self.categoryColor = newValue.hex
}
}
}
关于ios - 如何将颜色保存到 Realm 并在其他viewController中显示颜色？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58606517/