Swift-Extension

add property in extension

generally extension can’t add peoperty

class extensionClass {
    
}

extension extensionClass {
    
private static var propertyKey: UInt8 = 0
    var property: People? {
    
        set {
    
            objc_setAssociatedObject(self, &Self.propertyKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
        
        get {
    
            objc_getAssociatedObject(self,&Self.propertyKey) as? People
        }
    }
}