我有一个带有数据填充的 TableView Controller 。我试图在用户点击单元格时推送一个新的详细信息 View 。我可以加载 View ，但是更详细地显示数据的标签不会更新。这是代码:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
SearchDetailViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"searchDetailVC"];
Events *event = [events objectAtIndex:indexPath.row];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
NSString *dateString = [dateFormatter stringFromDate:event.eventDate];
controller.title=event.eventName; //ONLY ONE THAT WORKS!
controller.eventName.text = event.eventName;
controller.eventAddress.text = event.eventAddress;
controller.eventDate.text = dateString;
controller.eventTime.text = event.eventTime;
controller.ratingView.image = [self imageForRating:event.eventRating];
controller.eventDistance.text = @"NOT YET IMPLEMENTED";
[self.navigationController pushViewController:controller animated:YES];
}
设置的唯一属性是 NavigationController 导航栏的标题。我做错了什么吗？
最佳答案
你不能像这样传递数据。此时 ViewController.domainField 为 nil，因为 View 尚未加载，并且标签/TextField 是在 View 加载时(通过 Nib )创建的，而不是在创建 View Controller 对象后立即创建的。
这段代码可以帮助你
SearchDetailViewController.h
#import <UIKit/UIKit.h>
@interface SearchDetailViewController : UIViewController
{
NSString* eventNameString ;
NSString* eventAddressString;
...........
.............
}
@property (nonatomic,retain) NSString* eventNameString ;
@property (nonatomic,retain) NSString* eventAddressString;
...............
...............
@end
SearchDetailViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
eventName.text=eventNameString;
eventAddress.text=eventAddressString;
..........................
..........................
eventNameString=[[NSString alloc]initWithString:@""];
}
TableView.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
SearchDetailViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"searchDetailVC"];
Events *event = [events objectAtIndex:indexPath.row];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
NSString *dateString = [dateFormatter stringFromDate:event.eventDate];
controller.title=event.eventName; //ONLY ONE THAT WORKS!
controller.eventNameString=[[NSString alloc]initWithString:event.eventName];
controller.eventAddressString=[[NSString alloc]initWithString:eventAddress];
...............................
...............................
............
[self.navigationController pushViewController:controller animated:YES];
}
同样，您必须将所有数据从一个 View 传递到另一个 View - 您不能直接分配给 Controller 。
关于ios - 推送时数据未传递到 View Controller ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8798188/