// 添加通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textFieldEditChanged:)
name:@"UITextViewTextDidChangeNotification" object:self.textv];
// 解決中文? 第三方鍵盤? 輸入moji表情問題
-(void)textFieldEditChanged:(NSNotification *)obj
{
UITextView *textField = (UITextView *)obj.object;
NSString *toBeString = textField.text;
//獲取高亮部分
UITextRange *selectedRange = [textField markedTextRange];
UITextPosition *position = [textField positionFromPosition:selectedRange.start offset:0];
// 沒有高亮選擇的字，則對已輸入的文字進行字數統計和限制
if (!position)
{
if (toBeString.length > MAXLENGTH)
{
NSRange rangeIndex = [toBeString rangeOfComposedCharacterSequenceAtIndex:5];
if (rangeIndex.length == 1)
{
textField.text = [toBeString substringToIndex:MAXLENGTH];
}
else
{
NSRange rangeRange = [toBeString rangeOfComposedCharacterSequencesForRange:NSMakeRange(0, MAXLENGTH)];
textField.text = [toBeString substringWithRange:rangeRange];
}
}
}
}
