重构了KBFunctionView

CustomKeyboard/View/Function/KBStreamOverlayView.h

@@ -0,0 +1,28 @@
+//
+//  KBStreamOverlayView.h
+//  自带关闭按钮的流式展示层，内部持有 KBStreamTextView。
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class KBStreamTextView, KBStreamOverlayView;
+
+@protocol KBStreamOverlayViewDelegate <NSObject>
+@optional
+- (void)streamOverlayDidTapClose:(KBStreamOverlayView *)overlay;
+@end
+
+@interface KBStreamOverlayView : UIView
+
+@property (nonatomic, strong, readonly) KBStreamTextView *textView;
+@property (nonatomic, weak, nullable) id<KBStreamOverlayViewDelegate> delegate;
+
+- (void)appendChunk:(NSString *)text;
+- (void)finish;
+
+@end
+
+NS_ASSUME_NONNULL_END
+