WSInputLimit

    UITextView *textView = nil;
    /// 是否禁用限制
    textView.limit.disable = YES;
    /// 禁用emoji输入
    textView.limit.disableEmoji = YES;

    /// 允许最大输入100个字符(length长度大于1的,按照1个字符计算)
    textView.limit.maxCharacterNumber = 100;

    /// 仅输入数字
    textView.limit.onlyNumbers = YES;
    /// 仅输入中文
    textView.limit.onlyChinese = YES;
    /// 仅输入英文字母
    textView.limit.onlyLetter = YES;

    /// 控制输入小数样式
    textView.limit.decimaStyle = YES;
    /// 控制小数位数
    textView.limit.decimalPlace = 2;

    /// 过滤输入中的数字(即数字不能输入)
    textView.limit.filterPattern = @"[0-9]+";
    /// 只允许输入数字
    textView.limit.allowPattern = @"[0-9]+";

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewTextDidChange:) name:UITextViewTextDidChangeNotification object:textView];

- (void)textViewTextDidChange:(NSNotification *)notifi {
    NSLog(@"当前输入: %d, 还可以输入: %d", textView.limit.currentCharNumber, textView.limit.canEnterCharNumber);
}

Latest podspec

{
    "name": "WSInputLimit",
    "version": "0.0.2",
    "summary": "UITextView/UITextField Input Limit",
    "description": "* u652fu6301u7981u6b62emojiu8f93u5165n* u652fu6301u6700u5927u53efu8f93u5165u5b57u7b26u6570u91cfu9650u5236n* u652fu6301u9650u5236u4ec5u8f93u5165u6570u5b57n* u652fu6301u9650u5236u4ec5u8f93u5165u4e2du6587n* u652fu6301u9650u5236u4ec5u8f93u5165u82f1u6587u5b57u6bcdn* u652fu6301u5c0fu6570u6837u5f0fu8f93u5165u9650u5236n* u652fu6301u5c0fu6570u70b9u4f4du6570u9650u5236n* u652fu6301u81eau5b9au4e49u6b63u5219u5f0fu65b9u5f0fu8f93u5165",
    "homepage": "https://github.com/ONECATYU/WSInputLimit",
    "license": {
        "type": "MIT",
        "file": "LICENSE"
    },
    "authors": {
        "ONECATYU": "[email protected]"
    },
    "platforms": {
        "ios": "8.0"
    },
    "source": {
        "git": "https://github.com/ONECATYU/WSInputLimit.git",
        "tag": "0.0.2"
    },
    "source_files": [
        "WSInputLimit",
        "WSInputLimit/**/*.{h,m}"
    ],
    "frameworks": [
        "UIKit",
        "Foundation"
    ],
    "requires_arc": true
}

Fri, 25 Jan 2019 11:49:05 +0000