added files via upload

Tweaks/FLEX/Editing/ArgumentInputViews/FLEXArgumentInputView.h

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+//
+//  FLEXArgumentInputView.h
+//  Flipboard
+//
+//  Created by Ryan Olson on 5/30/14.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+typedef NS_ENUM(NSUInteger, FLEXArgumentInputViewSize) {
+    /// 2 lines, medium-sized
+    FLEXArgumentInputViewSizeDefault = 0,
+    /// One line
+    FLEXArgumentInputViewSizeSmall,
+    /// Several lines
+    FLEXArgumentInputViewSizeLarge
+};
+
+@protocol FLEXArgumentInputViewDelegate;
+
+@interface FLEXArgumentInputView : UIView
+
+- (instancetype)initWithArgumentTypeEncoding:(const char *)typeEncoding;
+
+/// The name of the field. Optional (can be nil).
+@property (nonatomic, copy) NSString *title;
+
+/// To populate the filed with an initial value, set this property.
+/// To reteive the value input by the user, access the property.
+/// Primitive types and structs should/will be boxed in NSValue containers.
+/// Concrete subclasses should override both the setter and getter for this property.
+/// Subclasses can call super.inputValue to access a backing store for the value.
+@property (nonatomic) id inputValue;
+
+/// Setting this value to large will make some argument input views increase the size of their input field(s).
+/// Useful to increase the use of space if there is only one input view on screen (i.e. for property and ivar editing).
+@property (nonatomic) FLEXArgumentInputViewSize targetSize;
+
+/// Users of the input view can get delegate callbacks for incremental changes in user input.
+@property (nonatomic, weak) id <FLEXArgumentInputViewDelegate> delegate;
+
+// Subclasses can override
+
+/// If the input view has one or more text views, returns YES when one of them is focused.
+@property (nonatomic, readonly) BOOL inputViewIsFirstResponder;
+
+/// For subclasses to indicate that they can handle editing a field the give type and value.
+/// Used by FLEXArgumentInputViewFactory to create appropriate input views.
++ (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value;
+
+// For subclass eyes only
+
+@property (nonatomic, readonly) UILabel *titleLabel;
+@property (nonatomic, readonly) NSString *typeEncoding;
+@property (nonatomic, readonly) CGFloat topInputFieldVerticalLayoutGuide;
+
+@end
+
+@protocol FLEXArgumentInputViewDelegate <NSObject>
+
+- (void)argumentInputViewValueDidChange:(FLEXArgumentInputView *)argumentInputView;
+
+@end