TextView：如何监听或处理空格键事件 [英] TextView: How to listen or handle space bar key event

问题描述

好吧，所以'return'是'insertNewline'，我喜欢，但在上帝的绿色地球是插入空间？

所以我试图在用户完成该单词后（即当他们点击空格键或返回时）调用拼写检查（对于关键字）。但爸爸需要检测空格。正在执行...

  / *监听命令* / 
  - （BOOL ）textView：（NSTextView *）aTextView doCommandBySelector：（SEL）aSelector 
 {
 BOOL result = NO; 
 if（@selector（insertNewline :) == aSelector）{
 //做某事
 result = YES; 
 return result; 
} 
 return result; 
  
 
 
解决方案
 （UITextView *）textView shouldChangeTextInRange：（NSRange）text（）（）（）（）范围
 replacementText：（NSString *）text 
 {
 //添加的任何新字符作为text参数传递
 if（[text isEqualToString：@\ n]）{
 //当按下返回键时的代码。 
} 
 else if（[text isEqualToString：@]）
 {
 //空格键按下时的代码。 
} 
 //对于任何其他字符返回TRUE，以便文本被添加到视图
 return TRUE; 
} 
  

Okay so 'return' is 'insertNewline', I love that, but where in god's green earth is the insertSpace?

So i'm trying to invoke a spellcheck (for a keyword) after the user completes the word (aka, when they hit space bar or return ). But daddy needs to detect space-bar. Heres the textView delegate method i'm implementing...

/* 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; 

解决方案

use the delegate method of UITextView as follows to achieve this...

- (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;
}

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