[self.nameTF addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
- (void)textFieldDidChange:(UITextField *)textField
{
if(textField == self.textFieldName) {
if(textField.text.length >15) {
UITextRange *markedRange = [textField markedTextRange];
if (markedRange) {
return;
}
//Emoji占2个字符，如果是超出了半个Emoji，用15位置来截取会出现Emoji截为2半
//超出最大长度的那个字符序列(Emoji算一个字符序列)的rangeNSRange range = [textField.text rangeOfComposedCharacterSequenceAtIndex:15];
textField.text = [textField.text substringToIndex:range.location];
}
}
}
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