Question

我正在使用iOS应用。在那个应用程序中我有文本域和文本视图。如果用户点击空格按钮两次，即使文本的开头或文本的结尾，我的要求是解除键盘。我尝试使用以下代码

** - （BOOL）textView：（UITextView *）textView shouldChangeTextInRange：（NSRange）range replacementText：（NSString *）text {

NSLog(@"textView.text %@",textView.text);
NSUInteger newLength = (textView.text.length - range.length) + text.length;
//for white space starting
NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:@" "] invertedSet];
NSString *filtered = [[text componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

if([text isEqualToString:@"\n"]) {
    [sendMsgTextView resignFirstResponder];
 //   [self animateTextView:textView up:NO];
    return NO;
   }
if ([textView.text isEqualToString:filtered]) {
       [sendMsgTextView resignFirstResponder];
    return NO;
}

返回YES; } **

但问题在于它仅限制文本的开头。如果我多次输入文本和点击空间，则键盘不会解除或不限制。任何人都可以了解这个问题。如果是这样，请提出宝贵的建议。

Answer 1

请使用以下解决方案..

<。>文件中的

@property（nonatomic，retain）NSString * spaceStr;

<。>文件中的

** - （BOOL）textView：（UITextView *）textView shouldChangeTextInRange：（NSRange）range replacementText：（NSString *）text {

if([text isEqualToString:@"\n"]) {
    [self.txtView1 resignFirstResponder];
    //   [self animateTextView:textView up:NO];
    return NO;
}
if ([[self.spaceStr stringByAppendingString:text] isEqualToString:@"  "]) {
    self.spaceStr=@"";
    [self.txtView1 resignFirstResponder];
    return NO;
}
self.spaceStr=text;

return YES;

}

Answer 2

我使用以下链接使用以下代码

- (BOOL) textView:(UITextView*)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text
{

 //for restricting the double space for before entering text as well as after entering the text
    if ( (range.location > 0 && [text length] > 0 &&
          [[NSCharacterSet whitespaceCharacterSet] characterIsMember:[text characterAtIndex:0]] &&
          [[NSCharacterSet whitespaceCharacterSet] characterIsMember:[[textView text] characterAtIndex:range.location - 1]]) )

    {
        //Manually replace the space with your own space, programmatically
        textView.text = [textView.text stringByReplacingCharactersInRange:range withString:@""];

        //Make sure you update the text caret to reflect the programmatic change to the text view
        textView.selectedRange = NSMakeRange(range.location+1, 0);

        //Tell Cocoa not to insert its space, because you've just inserted your own
        return NO;
    }
}

，链接是 iPhone: Disable the "double-tap spacebar for ." shortcut?

用于textview或textfield iOS的双空间点击

2 个答案: