uitextview/uitextfield限制字数-尊龙凯时

  (void)limittextfieldlength:(uitextfield *)textfield maxlength:(nsinteger)maxlength {
    nsstring *tobestring = textfield.text;
    nsstring *lang = [[textfield textinputmode] primarylanguage]; // 键盘输入模式
    if ([lang isequaltostring:@"zh-hans"]) { // 简体中文输入，包括简体拼音，健体五笔，简体手写
        uitextrange *selectedrange = [textfield markedtextrange];
        //获取高亮部分
        uitextposition *position = [textfield positionfromposition:selectedrange.start offset:0];
        // 没有高亮选择的字，则对已输入的文字进行字数统计和限制
        if (!position) {
            if (tobestring.length > maxlength) {
                textfield.text = [tobestring substringtoindex:maxlength];
            }
        } else {
            // 有高亮选择的字符串，则暂不对文字进行统计和限制
        }
    } else {
        // 中文输入法以外的直接对其统计限制即可，不考虑其他语种情况
        if (tobestring.length > maxlength) {
            textfield.text = [tobestring substringtoindex:maxlength];
        }
    }
}
  (void)limittextviewlength:(uitextview *)textview maxlength:(nsinteger)maxlength {
    nsstring *tobestring = textview.text;
    nsstring *lang = [[textview textinputmode] primarylanguage];
    if ([lang isequaltostring:@"zh-hans"]) {
        uitextrange *selectedrange = [textview markedtextrange];
        uitextposition *position = [textview positionfromposition:selectedrange.start offset:0];
        if (!position) {
            if (tobestring.length > maxlength) {
                textview.text = [tobestring substringtoindex:maxlength];
            }
        }
    } else {
        if (tobestring.length > maxlength) {
            textview.text = [tobestring substringtoindex:maxlength];
        }
    }
}