ios - 使用日语键盘时不调用 UIKeyInput

Question

我有一个继承自 UIView 并符合 UIKeyInput 的类*.h*

@interface UIKeyInputExampleView : UIView  <UIKeyInput>{
    NSMutableString *textStore;
}

@property (nonatomic, retain) NSMutableString *textStore;

@end

.m

@implementation UIKeyInputExampleView

@synthesize textStore;

- (id)initWithFrame:(CGRect)frame {
    if ((self = [super initWithFrame:frame])) {
        // Initialization code
        self.textStore = [NSMutableString string];
        [self.textStore appendString:@"Touch screen to edit."];

        self.backgroundColor = [UIColor whiteColor];
    }
    return self;
}

- (void)dealloc {
    [textStore dealloc];
    [super dealloc];
}

#pragma mark -
#pragma mark Respond to touch and become first responder.

- (BOOL)canBecomeFirstResponder { return YES; }
-(void) touchesBegan: (NSSet *) touches withEvent: (UIEvent *) event {
    [self becomeFirstResponder];
} 

#pragma mark -
#pragma mark Drawing

- (void)drawRect:(CGRect)rect {
    CGRect rectForText = CGRectInset(rect, 20.0, 20.0);
    UIRectFrame(rect);
    [self.textStore drawInRect:rectForText withFont:[UIFont fontWithName:@"Helvetica" size:24.0f]];
}

#pragma mark -
#pragma mark UIKeyInput Protocol Methods

    - (BOOL)hasText {
        if (textStore.length > 0) {
            return YES;
        }
        return NO;
    }

    - (void)insertText:(NSString *)theText {
        NSLog(@"Text have just enter:%@ length=%d ascii=%d",theText,theText.length,[theText characterAtIndex:0]);
        if ([theText isEqualToString:@"\n"]) {
            NSLog(@"Enter have just pressed!");
            [self resignFirstResponder];
        }
        self.textStore = (NSMutableString*)theText; 
        [self setNeedsDisplay];
    }

    - (void)deleteBackward {
        self.textStore = (NSMutableString*)@"delete"; 
        [self setNeedsDisplay];
    }

    @end

当我使用英语或越南语键盘时，一切正常。但是当我使用日语键盘时，没有事件被调用，没有异常被抛出。我想我没有遵守某些协议(protocol)

你能帮帮我吗？

Answer 1

花了一些时间，但终于成功了。
1. 对于单个字符 - 我仍然使用 UIKeyInput 协议(protocol)。
2. 对于东亚语言，我使用 NSString 属性 intlInput 来获取所有输入字符。以下是允许执行此操作的 UITextInput 协议(protocol)的两种方法。

- (void)setMarkedText:(NSString *)markedText selectedRange:(NSRange)selectedRange {
    self.intlInput = markedText;
}
- (void) unmarkText {
    if (!self.intlInput) return;
    for (int i=0;i<self.intlInput.length;i++) {
        [self sendChar:[self.intlInput characterAtIndex:i]];
    }
    self.intlInput = nil;
}

sendChar - 是调用以获取组合输入的所有字符的任何方法。您可以在文本未标记(选择了某些组合)时发布通知。