TextView：如何监听或处理空格键事件

Question

好的，'返回'是'insertNewline'，我喜欢这个，但是在上帝的绿色地球中是insertSpace？

所以我试图在用户完成单词后（也就是当他们点击空格键或返回时）调用拼写检查（对于关键字）。但是爸爸需要检测空格键。下面是我正在实现的textView委托方法......

/* listen to commands */ 
-(BOOL)textView:(NSTextView *)aTextView doCommandBySelector:(SEL)aSelector
{
    BOOL result = NO;
    if (@selector(insertNewline:) == aSelector) {
    // does something 
    result = YES; 
    return result; 
}
return result; 

Answer 1

使用 UITextView 的委托方法，如下所示...

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range
 replacementText:(NSString *)text
{
    // Any new character added is passed in as the "text" parameter
    if ([text isEqualToString:@"\n"]) {
        //code when return key pressed.
    }
    else if([text isEqualToString:@" "])
    {
        //code when space key pressed.
    }
    // For any other character return TRUE so that the text gets added to the view
    return TRUE;
}