fix issue that can not receive Chinese characters with system input m… (#20232)

Author: minggo

cocos/platform/ios/CCInputView-ios.h

@@ -1,4 +1,4 @@
 #import <UIKit/UIKit.h>
 
-@interface CCInputView : UIView <UIKeyInput>
+@interface CCInputView : UIView <UITextInput>
 @end

cocos/platform/ios/CCInputView-ios.mm

@@ -14,9 +14,18 @@ @implementation CCInputView
 @synthesize myMarkedText;
 @synthesize isKeyboardShown;
 
+@synthesize hasText;
+@synthesize selectedTextRange;
+@synthesize beginningOfDocument;
+@synthesize endOfDocument;
+@synthesize markedTextStyle;
+@synthesize tokenizer;
+@synthesize autocorrectionType;
+
 - (instancetype) initWithFrame:(CGRect)frame {
     if (self = [super initWithFrame:frame] ) {
         self.myMarkedText = nil;
+        self.autocorrectionType = UITextAutocorrectionTypeNo;
     }
 
     return self;
@@ -35,14 +44,14 @@ - (void)didMoveToWindow
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(onUIKeyboardNotification:)
                                                  name:UIKeyboardWillShowNotification object:nil];
-    
+
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(onUIKeyboardNotification:)
                                                  name:UIKeyboardDidShowNotification object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(onUIKeyboardNotification:)
                                                  name:UIKeyboardWillHideNotification object:nil];
-    
+
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(onUIKeyboardNotification:)
                                                  name:UIKeyboardDidHideNotification object:nil];
@@ -62,6 +71,14 @@ - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
 
 #pragma TextInput protocol
 
+- (id<UITextInputDelegate>)inputDelegate {
+    return nil;
+}
+
+- (void)setInputDelegate:(id<UITextInputDelegate>)inputDelegate {
+    
+}
+
 - (void)deleteBackward {
     if (nil != self.myMarkedText) {
         [self.myMarkedText release];
@@ -178,7 +195,7 @@ - (nullable NSString *)textInRange:(nonnull UITextRange *)range {
     if (nil != self.myMarkedText) {
         return self.myMarkedText;
     }
-    return nil;
+    return @"";
 }
 
 - (nullable UITextRange *)textRangeFromPosition:(nonnull UITextPosition *)fromPosition toPosition:(nonnull UITextPosition *)toPosition {
@@ -327,6 +344,4 @@ - (void)onUIKeyboardNotification:(NSNotification *)notif
     }
 }
 
-@synthesize hasText;
-
 @end