调用时如何在 viewController 中保留我的 uitextfield 值? [英] how to retain my uitextfield values in viewController when i calling?

问题描述

当我导航到不同的视图并返回到我的第一个视图时，我的第一个视图中有一个包含 3 个文本字段的主页(即，在我输入所有值后，我移动到下一页).我希望我的 3 个文本字段保留当我回到我的主页这里我的示例代码时它的价值:

I have a main page having 3 textfield in my first view as i navigate to different view and return back to my first view (i.e after i enter all the values i moving to next page).I want my 3 textfield to retain its value when i go back to my main page here my sample code :

 NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
 NSString *mobile = MobileNum.text;
 [defaults setObject:mobile forKey:self.MobileNum.text];
 NSString *amountText = amount.text;
 [defaults setObject:amountText forKey:self.amount.text];
 [defaults synchronize];
 NSString *temp = [defaults objectForKey:self.MobileNum.text];
 NSString *temp1 = [defaults objectForKey:self.amount.text];
 NSLog(@"%@ %@",temp,temp1);

推荐答案

在你的 viewWillDisappear 方法中存储默认值.

at you viewWillDisappear method store the defaults like.

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
 NSString *mobile = MobileNum.text;
 [defaults setObject:mobile forKey:@"mobileNumber"];
 NSString *amountText = amount.text;
 [defaults setObject:amountText forKey:@"amount"];
 [defaults synchronize];

再次在您的 viewWillAppear 方法中检索类似的值.

again at your viewWillAppear method retrieve the values like.

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   if ([[defaults valueForKey:@"mobileNumber"] length]>0){
     MobileNum.text=[defaults valueForKey:@"mobileNumber"];
   }
 else {
     MobileNum.text=@"";
  }
  if ([[defaults valueForKey:@"amount"] length]>0) {
    amount.text=[defaults valueForKey:@"amount"];
   }
 else {
    amount.text=@"";
  }

它会起作用.

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