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若设置了验证码/密码的位数,和是否密文显示,则需要保持label中相应属性与vertificationCodeInputView中一致
- (void)setNumberOfVertificationCode:(NSInteger)numberOfVertificationCode { _numberOfVertificationCode = numberOfVertificationCode; // 保持label的验证码/密码位数与IDVertificationCodeInputView一致,此时label一定已经被创建 self.label.numberOfVertificationCode = _numberOfVertificationCode; } - (void)setSecureTextEntry:(bool)secureTextEntry { _secureTextEntry = secureTextEntry; self.label.secureTextEntry = _secureTextEntry; }4、弹出键盘,并接收键盘输入的字符
弹出键盘
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self.textField becomeFirstResponder]; }接收键盘输入的字符
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { // 判断是不是“删除”字符 if (string.length != 0) {// 不是“删除”字符 // 判断验证码/密码的位数是否达到预定的位数 if (textField.text.length < self.numberOfVertificationCode) { self.label.text = [textField.text stringByAppendingString:string]; self.vertificationCode = self.label.text; return YES; } else { return NO; } } else { // 是“删除”字符 self.label.text = [textField.text substringToIndex:textField.text.length - 1]; self.vertificationCode = self.label.text; return YES; } }5、绘制验证码/密码(IDLabel)
手动调用drawRect方法
//重写setText方法,当text改变时手动调用drawRect方法,将text的内容按指定的格式绘制到label上 - (void)setText:(NSString *)text { [super setText:text]; // 手动调用drawRect方法 [self setNeedsDisplay]; }绘制验证码/密码
// 按照指定的格式绘制验证码/密码 - (void)drawRect:(CGRect)rect { //计算每位验证码/密码的所在区域的宽和高 float width = rect.size.width / (float)self.numberOfVertificationCode;; float height = rect.size.height; // 将每位验证码/密码绘制到指定区域 for (int i = 0; i < self.text.length; i++) { // 计算每位验证码/密码的绘制区域 CGRect tempRect = CGRectMake(i * width, 0, width, height); if (self.secureTextEntry) { // 密码,显示圆点 UIImage *dotImage = [UIImage imageNamed:@"dot"]; // 计算圆点的绘制区域 CGPoint securityDotDrawStartPoint = CGPointMake(width * i + (width - dotImage.size.width) / 2.0, (tempRect.size.height - dotImage.size.height) / 2.0); // 绘制圆点 [dotImage drawAtPoint:securityDotDrawStartPoint]; } else { // 验证码,显示数字 // 遍历验证码/密码的每个字符 NSString *charecterString = [NSString stringWithFormat:@"%c", [self.text characterAtIndex:i]]; // 设置验证码/密码的现实属性 NSMutableDictionary *attributes = [[NSMutableDictionary alloc] init]; attributes[NSFontAttributeName] = self.font; // 计算每位验证码/密码的绘制起点(为了使验证码/密码位于tempRect的中部,不应该从tempRect的重点开始绘制) // 计算每位验证码/密码的在指定样式下的size CGSize characterSize = [charecterString sizeWithAttributes:attributes]; CGPoint vertificationCodeDrawStartPoint = CGPointMake(width * i + (width - characterSize.width) / 2.0, (tempRect.size.height - characterSize.height) / 2.0); // 绘制验证码/密码 [charecterString drawAtPoint:vertificationCodeDrawStartPoint withAttributes:attributes]; } } }










