动态分配文本到标签

Question

我让用户通过文本字段输入文本，然后将其显示在单独 ViewController 的标签中。

基本上我需要做的是

1 - 让用户输入文本

2 - 第二个 ViewController 创建文本并将其分配给标签

我需要用户输入多个数据条目，因此需要在用户输入数据时动态创建标签。

我正在使用委托通过 ViewControllers 传递我的数据。

感谢您的帮助！

Answer 1

ViewController1

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Pass duration and time of day through to dataHistory
    if ([[segue identifier] isEqualToString:@"dataViewSegue"])
    {
        dataHistory *dataHistory = [segue destinationViewController];
        dataHistory.duration = self.durationTextField.text;
        dataHistory.timeOfDay = self.userChoice;
    }
}

ViewController2

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    if ([durationLabel.text  isEqual: @""])
    {
        [durationLabel setHidden:YES];
        [timeOfDayLabel setHidden:YES];
        [editButton setHidden:YES];
    }
    self.durationLabel.text = [self.duration description];
    self.timeOfDayLabel.text = [self.timeOfDay description];
}

Answer 2

为什么不考虑NSUserDefaults？它甚至可以跨会话传递数据。

传递数据：


- (IBAction)saveLabel:(id)sender {
    NSArray *data = [[NSUserDefaults standardUserDefaults] objectForKey:@"DATA"];
    NSMutableArray *currentDataArray;
    if (data == nil) {
        currentDataArray = [[NSMutableArray alloc]init];
    } else {
        currentDataArray = [[NSMutableArray alloc]initWithArray:data];
    }
    [currentDataArray addObject:self.textField.text];
    [[NSUserDefaults standardUserDefaults] setObject:currentDataArray forKey:@"DATA"];
}

处理数据：（在另一个视图控制器中）


- (void) viewWillAppear:(BOOL)animated {
    NSArray *dataArray = [[NSUserDefaults standardUserDefaults]objectForKey:@"DATA"];
    if (dataArray != nil) {
        int count = 0;
        for (NSString *text in dataArray) {
            UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 200 + 40 * count, self.view.frame.size.width, 40)];
            label.text = text;
            [self.view addSubview:label];
            count++;
        }
    }
}

可在 https://github.com/null09264/Demo-Stack

找到演示

动态分配文本到标签

Assigning Text to Labels Dynamically

objective-c

uilabel

ios