***-[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0]
字典传空值报错
字典传值前加入判断
如用户名密码textfield为空
UITextField *userName = (UITextField *)[self.xxxXibView viewWithTag:1];
UITextField *psw = (UITextField *)[self.xxxXibView viewWithTag:2];
if (userName.text != nil && psw.text != nil){
NSDictionary *dict = @{@"UserName": userName.text, @"Password": psw.text};
}