Base class for quick implementation UIControl subclass based on standard(enabled, highlighted, selected) and custom states. Implementation based on KVC.
QUIckControl is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "QUIckControl"You may to bind value for specific target with state of types:
- simple state as bitmask (UIControlState);
- state, which contains in current state (.intersected);
- all states, which not matched specified state (.inverted);
- all states, where current state contains one or more specified substates (.oneOfSeveral);
- all states, where current state not contains specified substates (.noneOfThis);
- custom state, which you implemented (.custom);
All state types have priority and value setup from most high priority state. In default implementation simple state have priority 1000, intersected 999, inverted 750, oneOfSeveral and noneOfThis 500, custom user defined. For any type of state descriptor you may set your priority.
Example usage:
In most cases, state looks like bool property or him may be represented in bool property. So, before setup value for state, it need register using:
func register(_ state: UIControlState, forBoolKeyPath keyPath: String, inverted: Bool)
func register(_ state: UIControlState, with predicate: NSPredicate)example:
register(.disabled, forBoolKeyPath: #keyPath(UIControl.enabled), inverted: true)
register(.valid, with: NSPredicate { control, _ in
return control.filled && control.valid
})Immediately, after registration you may setup values for this state using:
func setValue(_ value: Any?, forTarget: NSObject = default, forKeyPath: String, forInvertedState: UIControlState) {
func setValue(_ value: Any?, forTarget: NSObject = default, forKeyPath: String, forAllStatesContained: UIControlState)
func setValue(_ value: Any?, forTarget: NSObject = default, forKeyPath: String, for: UIControlState)
func setValue(_ value: Any?, forTarget: NSObject = default, forKeyPath: String, for: QUICStateDescriptor)examples:
control.setValue(UIColor.black, forKeyPath: #keyPath(UIView.backgroundColor), forAllStatesContained: .highlighted)
control.setValue("QuickControl sended this string",
forTarget:receiver
forKeyPath: #keyPath(StringReceiver.value),
for: QUICStateDescriptor(state: [.filled, .invalid], priority: 1000, predicate: { $0.contains(.filled) && !$0.contains(.invalid) }))Remove values:
func removeValues(forTarget target: NSObject, forKeyPath key: String, forState state: UIControlState)
func removeValues(forTarget target: NSObject, forKeyPath key: String)
func removeValues(forTarget target: NSObject? = default)For multiple switches state factors (aka bool property) use transitions:
func beginTransition()
func endTransition() // without apply current state
func commitTransition() // with apply current state
func performTransition(withCommit commit: Bool = default, transition: () -> Void)You may subscribe on state and events using:
func subscribe(on events: UIControlEvents, _ action: @escaping (QUIckControl) -> Void) -> QUIckControlActionTarget
func subscribe(on state: QUICStateDescriptor, _ action: @escaping () -> ())example:
control.subscribe(on: QUICStateDescriptor(intersected: .valid), { button.enabled = true })
QUIckControl subclass, which is used for input PIN code. It uses programming states for change visual view.
pod "PinCodeControl"Custom event and states:
extension UIControlEvents {
public static var typeComplete = UIControlEvents(rawValue: 1 << 24)
}
extension UIControlState {
public static var filled = UIControlState(rawValue: 1 << 16)
public static var invalid = UIControlState(rawValue: 1 << 17)
public static var valid = UIControlState(rawValue: (1 << 18) | filled.rawValue)
}
// preset state descriptors
enum States {
static public let plain: QUICStateDescriptor
static public let valid: QUICStateDescriptor
static public let invalid: QUICStateDescriptor
static public let highlighted: QUICStateDescriptor
static public let disabled: QUICStateDescriptor
}Main API
var code: String { get } // entered code
var filled: Bool { get } // enabled, when all code entered
var valid: Bool { get } // disabled, when entered code invalid
var validator: BlockPredicate<String>? // object for user validation pin code value
var shouldUseDefaultValidation: Bool // if true, then code equal strings, such as '1111', '1234', '9876' will be defined as invalid values
var filledItemColor: UIColor? // color for entered code element
var itemPath: UIBezierPath? // bezier path for code element
init(parameters: Parameters, frame: CGRect? = default) // main initializer
func clear() // clear all entered code
// methods for set parameters for each state
func setFillColor(fillColor: UIColor?, for state: QUICStateDescriptor)
func setBorderColor(borderColor: UIColor?, for state: QUICStateDescriptor)
func setBorderWidth(borderWidth: CGFloat, for state: QUICStateDescriptor)
func setForValidState(fillColor: UIColor?, borderColor: UIColor?, borderWidth: CGFloat)
func setForInvalidState(fillColor: UIColor?, borderColor: UIColor?, borderWidth: CGFloat)
func setForPlainState(fillColor: UIColor?, borderColor: UIColor?, borderWidth: CGFloat)
func setForHighlightedState(fillColor: UIColor?, borderColor: UIColor?, borderWidth: CGFloat)
func setForDisabledState(fillColor: UIColor?, borderColor: UIColor?, borderWidth: CGFloat)
// validation
func validate() -> Bool // perform validation current code value
func validate(_ pin: String) -> Bool // method for validation entered pin code. Declared for subclasses override.For quick research pattern this implementation, you may see project: https://github.com/k-o-d-e-n/Statable
Denis Koryttsev, koden.u8800@gmail.com
QUIckControl is available under the MIT license. See the LICENSE file for more info.