Xcode：为什么我的应用程序不保存 UITextField？
我有一个应用程序，我可以使用presentModalViewController切换到带有TableView的视图。然而，带有 TableView 的视图不在 UITableViewController 中，而是在常规 UIViewController 中。我已将 UITextFields 写入 UITableViewCells 中。我使用此操作来保存用户输入的内容：
- (IBAction)saveTextField:(id)sender {
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:TextField.text forKey:@"keyTextField"];
[userDefaults synchronize]; }
我使用以下代码调用此方法：
[TextField addTarget:self action:@selector(hideKeyboard:) forControlEvents:UIControlEventEditingDidEndOnExit];
当我使用dismissModalViewController关闭ViewController时，然后当我再次呈现它时，我使用以下代码调用ViewDidLoad中的NSUserDefaults：
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
TextField.text = [userDefaults objectForKey:@"keyTextField"];
问题是它不'不工作。而且我无法找出问题所在。任何帮助将不胜感激。
提前致谢 ：）
I have an app where I switch to a view with a TableView using presentModalViewController. The View with the TableView is however not at UITableViewController but a regular UIViewController. I have written UITextFields into the UITableViewCells. I use this action to save what the user inputs:
- (IBAction)saveTextField:(id)sender {
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:TextField.text forKey:@"keyTextField"];
[userDefaults synchronize]; }
I call this method with this code:
[TextField addTarget:self action:@selector(hideKeyboard:) forControlEvents:UIControlEventEditingDidEndOnExit];
When I dismiss the ViewController using dismissModalViewController and then when I presents it again I call the NSUserDefaults in the ViewDidLoad with this code:
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
TextField.text = [userDefaults objectForKey:@"keyTextField"];
Problem is that it doesn't work. And I can't figure out the problem. Any help would be appreciated.
Thanks in advance :)
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评论（4）
target必须与您的方法相同，这意味着如果您有- (void)saveTextField:(id)sender那么您需要编写添加目标的代码使用
NSLog检查您的操作是否正在运行。The
targethas to be the same as your method, meaning that if you have- (void)saveTextField:(id)senderthen you code to add the target need to beCheck usin
NSLogif your action is being run.您不能使用 textFieldDidEndEditing: 委托方法来进行保存，而不是设置目标吗？
Instead of setting a target, can't you do that saving with the textFieldDidEndEditing: delegate method?
在视图中使用此代码已加载
NSUserDefaults *user=[NSUserDefaults standardUserDefaults];
TextField.text=[用户 stringForKey:@"keyTextField"];
use this code in view did load
NSUserDefaults *user=[NSUserDefaults standardUserDefaults];
TextField.text=[user stringForKey:@"keyTextField"];
首先：感谢大家付出的努力和时间:)
事实证明，问题不在于保存和加载它的代码。问题是我只创建了一个 UITextfield，然后将其放入每个 UITableViewCell 中，这就是问题所在。所以我为每个 UITableViewCells 创建了单独的 UITextFields 并解决了问题:)
To begin with: thanks to all of you for your effort and time :)
Turns out the problem wasn't with the code that saves and loads it. The problem was that I only created one UITextfield which I then put into every UITableViewCell and that was the problem. So I created individual UITextFields for every UITableViewCells and that fixed the problem :)