iphone - UITextView 文本未更新

Question

我有 UIWebview 用于显示文章。我需要选择一些文本并发送到另一个视图控制器 UITextView。但是当我安装应用程序时，我选择文本并将其加载到 viewcontroller1。但是当我转到 viewcontroller1 时，我选择了另一个文本，之前的文本只显示。它不会更新新文本。

代码：

视图控制器：

NSString *selection = [wbCont stringByEvaluatingJavaScriptFromString:@"window.getSelection().toString()"];

NSUserDefaults *userData1 = [NSUserDefaults standardUserDefaults];
    [userData1 setObject:selection forKey:@"preferenceName"];
    [userData1 synchronize];

 [self.navigationController pushViewController:viewcontroller1 animated:YES];

视图控制器1：

NSString *savedValue = [[NSUserDefaults standardUserDefaults]
                            stringForKey:@"preferenceName"];

textView.text = [NSString stringWithFormat:@"%@", savedValue];
 [self.view addSubview:textView];

Answer 1

在你的 viewcontroller1 尝试这样做

NSUserDefaults *userData1 = [NSUserDefaults standardUserDefaults];
NSString *savedValue = [userData1 valueForKey:@"preferenceName"];

textView.text = [NSString stringWithFormat:@"%@", savedValue];
[self.view addSubview:textView];

Answer 2

尝试这个 ：

NSString *selection = [wbCont stringByEvaluatingJavaScriptFromString:@"window.getSelection().toString()"];

    NSUserDefaults *userData1 = [NSUserDefaults standardUserDefaults];
    [userData1 setValue:selection forKey:@"preferenceName"];
    [NSUserDefaults standardUserDefaults] synchronize];
    [self.navigationController pushViewController:viewcontroller1 animated:YES];

//视图控制器

NSString *savedValue = [[NSUserDefaults standardUserDefaults]
                               valueForKey:@"preferenceName"];
 UITextView *textView = [UITextView alloc] initWithFrame : cgRectMake(0,0,200,50)]//if not created textview 
 [self.view addSubview:textView];
 textView.text = [NSString stringWithFormat:@"%@", savedValue];