Question

我有一个问题，当在iOS7上右对齐UITextField时，当用户键入“Space”时，它不会马上出现。如果我输入另一个字符，则显示空格。

在iOS 6中确实没有发生

http://www.blogosfera.co.uk/2013/10/ios-7-whitespace-not-visible-to-uitextfield-with-right-alignment/

任何人都知道如何解决这个问题？

Answer 1

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if (range.location == textField.text.length && [string isEqualToString:@" "]) {
        // ignore replacement string and add your own
        textField.text = [textField.text stringByAppendingString:@"\u00a0"];
        return NO;
    }
    // for all other cases, proceed with replacement
    return YES;
}

从文本中删除代码

self.txtFirstName.text = [self.txtFirstName.text stringByReplacingOccurrencesOfString:@"\u00a0" withString:@" "];

来自此stackoverflow答案 - Right aligned UITextField spacebar does not advance cursor in iOS 7

Answer 2

我不知道如何解决它，但我有一个建议，你可以，同时，用一个非常相似的unicode字符（如U + 00A0）替换所有空格，然后将它们切换回另一个字符已被键入？

只需在.h中加入<UITextFieldDelegate>，在viewDidLoad中设置UITextField.delegate = self;

然后执行以下内容：

 //!!!!!*****!*!*!!!*!*** Make SURE you set the delegate code before doing this (as mentioned in the original SO answer)

 -(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    if ([string isEqualToString:@" "]) {
        textField.text = [textField.text stringByReplacingCharactersInRange:range withString:@"\u00A0"];//U+00A0 is a unicode character that seems very similar to space but isn't treated as whitespace...
    } else {
        textField.text = [textField.text stringByReplacingOccurrencesOfString:@"\u00A0" withString:@" "];//switches our u+00A0 unicode character back to a white-space everytime a space is not typed.
    }
    return (![string isEqualToString:@" "]);//returns YES if it doesn't equal whitespace, else NO (because we did a manual replace)
}

*注意，我还没有机会测试它，因为我不在xCodeProj附近。让我知道它是如何工作的:)如果有人看到任何错误，请随时编辑O :)谢谢大家！

UITextField右对齐iOS 7

2 个答案: