Question

我刚开始学习，所以请放轻松...

目标是获取选择器中所选行的文本值，并在另一个视图的标签中显示该值。

现在我在存储字符串值时遇到困难，所有内容都会编译并加载，但第二个视图中的标签仍为空白。请取消通知我。

//String taken from selected pickerview line and stored in selectedstring
NSString *string = [NSString stringWithFormat:@"You Selected: %@",[_platforms objectAtIndex:row]];
Selectedstring.text = string;

在“下一个视图”按钮上按：

- (IBAction)NextView:(id)sender {
SecondView *secondview = [[SecondView alloc]init];

self.SecondViewData = secondview;
SecondViewData.passedValue = Selectedstring.text;

[self presentViewController:secondview animated:YES completion:nil];

然后在下一个视图的“viewdidload”区域中：

label.text = passedValue;

Answer 1

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component {
    SecondView *secondview = [[SecondView alloc]init];

self.SecondViewData = secondview;
SecondViewData.passedValue = Selectedstring.text;

[self presentViewController:secondview animated:YES completion:nil];
secondview.label.text = passedValue;  //passing values to uilabel
}

Answer 2

你只需要在ViewWillAppear而不是viewDidLoad中写下面的语句。

label.text = passedValue;

感谢

UIPickerview将文本传递给另一个视图中的标签

2 个答案: