Question

所以我目前正在尝试构建一个具有社交方面的iOS应用程序。因此，用户将拥有自己的个人资料，而不是。我试图从注册页面直接指向构建配置文件页面。我暂时使用parse.com作为我的后端。模拟器运行良好，直到我填写文本字段并按下注册按钮然后它崩溃说“由于未捕获的异常终止应用程序'NSInvalidArgumentException'，原因：'无效的类名。类名不能以下划线开头。”

任何想法都有错吗？

- (BOOL) shouldPerformSegueWithIdentifier:(NSString *)showBuildProfile sender:(id)sender {

        NSString *firstname = [self.firstNameField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        NSString *lastname = [self.lastNameField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        NSString *username = [self.userField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        NSString *password = [self.passwordField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        NSString *email = [self.emailField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

        if ([firstname length] == 0 || [lastname length] == 0 || [username length] == 0 || [password length] == 0 || [email length] == 0) {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Oops" message:@"Make sure you fill in all of the information." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [alertView show];
            return NO;
        } else {
            PFUser *newUser = [PFUser user];
            newUser.username = username;
            newUser.password = password;
            newUser.email = email;

            newUser[@"first name"] = self.firstNameField;
            newUser[@"last name"] = self.lastNameField;


            [newUser signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error){
                if (error) {
                    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry!" message:[error.userInfo objectForKey:@"error"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                    [alertView show];
                } else {
                    //Sign up the user.
                }
            }];
            return YES; }
}

Answer 1

您需要使用textFields的text属性

newUser[@"firstName"] = self.firstNameField.text;
newUser[@"lastName"] = self.lastNameField.text;
// also notice I removed the spaces, spaces make me nervous.

尝试在xcode中注册页面后指向构建配置文件页面。

1 个答案: