iOS自定义数字键盘-白红宇

美观简洁的数字键盘，支持小数、整数、负数、文本长度的控制

效果图

调用示例

EBNumberTextField *textField = [[EBNumberTextField alloc] initWithFrame:CGRectMake(115, y, 150, 30)];    // 键盘类型    textField.numberKeyboardType = EBNumberKeyboardTypeInteger;    // 文本长度    textField.maxLength = 5;    [self.view addSubview:textField];复制代码

实现步骤

定义一个键盘视图EBNumberKeyboardView在里面写好布局，代码没什么难点，这里就不贴出布局代码了，代理里面我定义了四个回调方法。

@protocol EBNumberKeyboardViewDelegate 
    
     @optional// 输入数字、小数点、负号- (void)numberKeyboardViewEditing:(EBNumberKeyboardView *)keyboardView text:(NSString*)text;// 点击完成输入- (void)numberKeyboardViewEndEditing:(EBNumberKeyboardView *)keyboardView;// 删除字符- (void)numberKeyboardViewDeleteText:(EBNumberKeyboardView *)keyboardView;// 清空文本- (void)numberKeyboardViewClearText:(EBNumberKeyboardView *)keyboardView;@end复制代码

定义一个继承自UITextField的视图EBNumberTextField，在里面指定self.inputView = "定义的键盘视图"。

- (instancetype)initWithFrame:(CGRect)frame {    if (self = [super initWithFrame:frame]) {        _maxLength = 0;        EBNumberKeyboardView *numberKeyboardView = [[EBNumberKeyboardView alloc] initWithKeyboardType:EBNumberKeyboardTypeDecimal];        numberKeyboardView.delegate = self;        self.inputView = numberKeyboardView;        /*         1.当使用第三方键盘管理类IQKeyboardManager，禁用toolBar         2.如果没有用到第三方键盘管理可以不加这行代码         3.可以把[UIView new]替换成一个自定义的视图来实现IQKeyboardManager的toolbar功能         */        self.inputAccessoryView = [UIView new];        _numberKeyboardView = numberKeyboardView;    }    return self;}#pragma mark - EBNumberKeyboardViewDelegate// 输入数字、小数点、负号- (void)numberKeyboardViewEditing:(EBNumberKeyboardView *)keyboardView text:(NSString*)text {    if ([text isEqualToString:kEBNumberKeyboardViewDotKey]) {        // 小数点不能在第一位并且只能有一个小数点        if (self.text.length == 0            || [self.text rangeOfString:kEBNumberKeyboardViewDotKey].location != NSNotFound) {            return;        }    }else if([text isEqualToString:kEBNumberKeyboardViewMinusKey]) {        // 负号只能在第一位        if (self.text.length > 0) {            return;        }    }    NSString *fullText = [self.text stringByAppendingString:text];    if (_maxLength >0 && fullText.length > _maxLength) {        return;    }    [self insertText:text];}// 点击完成输入- (void)numberKeyboardViewEndEditing:(EBNumberKeyboardView *)keyboardView {    [self resignFirstResponder];}// 删除字符- (void)numberKeyboardViewDeleteText:(EBNumberKeyboardView *)keyboardView {    [self deleteBackward];}// 清空文本- (void)numberKeyboardViewClearText:(EBNumberKeyboardView *)keyboardView {    self.text = @"";}复制代码

注意：调用[self insertText:text]插入输入文本，这样光标在哪，插入的代码就在哪。通过[self deleteBackward]删除文本，会从光标那里开始往前删除。