本文介绍了自定义键盘iPhone,UITextView中的退格按钮出现问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
检查此代码(我的自定义键盘"):
Check this code (My Custom Keyboard):
-(IBAction) updateTextBackSpace:(id)sender
{
if([txtview.text length]>0)
{
NSString *deletedLastCharString = [txtview.text substringToIndex:([txtview.text length]-1)];
[txtview setText:deletedLastCharString];
}
else
{
return nil;
}
}
问题是我不知道如何更改此代码.我可以删除光标处任何给定行中的任何文本,退格键从行尾开始删除.我应该能够从光标位置擦除(退格).
The thing is that I can't figure out how to change this code so that. I can erase any text in any give line at the cursor, the backspace starts to erase from end of the line. I should be able to erase(backspace) from the cursor location.
推荐答案
替换此
NSString *deletedLastCharString = [txtview.text substringToIndex:([txtview.text length]-1)];
与
NSRange range = [txtview selectedRange];
NSString *deletedLastCharString = [txtview.text substringToIndex:([range.location]-1)];
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