iOS交易密码输入框实现-优快云博客

本文链接：https://blog.youkuaiyun.com/koocui/article/details/51200208

本文介绍如何在iOS应用中使用UIAlertController创建一个带有安全文本输入的交易密码对话框，并验证用户输入是否符合规则。

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UIAlertController *ctrl = [UIAlertController alertControllerWithTitle:@”提示” message:@”请输入交易密码” preferredStyle:UIAlertControllerStyleAlert];
[ctrl addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.placeholder = @”请输入交易密码”;
textField.secureTextEntry = YES;
textField.keyboardType = UIKeyboardTypeNumberPad;
textField.delegate = self;
}];

    [ctrl addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel  handler:nil]];
    [ctrl addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault  handler:^(UIAlertAction * _Nonnull action) {

UITextField * sureFiled = ctrl.textFields.firstObject;
NSString * tradePwd = sureFiled.text;
if (tradePwd.length==0) {
[SVProgressHUD show];
[SVProgressHUD dismissWithError:@”交易密码不能为空” afterDelay:2.0f];
return;
}
if (tradePwd.length>6 || tradePwd.length<6){
[SVProgressHUD show];
[SVProgressHUD dismissWithError: @”交易密码只能为6位数字” afterDelay:2.0f];
return;
}

}】；

提示框加输入的类型