的iOS应用程序发送到实例,我的故事板是这样的:http://d.pr/7yAY(droplr URL)无法识别选择用故事板
问题是,当我点击登录按钮,我把拍摄的用户名到事件表视图控制器。要做到这一点,我使用prepareForSegue
函数,但显然当我尝试设置用户名引发异常。
我的代码如下:
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
- (IBAction) logintButton:(id)sender;
@property (weak, nonatomic) IBOutlet UITextField *username_tf; // textfield
@end
ViewController.m
#import "ViewController.h"
#import "EventsTableViewController.h"
@interface ViewController()
@end
@implementation ViewController
@synthesize username_tf;
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([[segue identifier] isEqualToString:@"ToMainApp"])
{
EventsTableViewController * dest = (EventsTableViewController *)[segue destinationViewController];
NSString * username = [[NSString alloc] initWithFormat:@"%@", username_tf.text];
[dest setUsername:username];
}
}
- (IBAction) logintButton:(id)sender
{
//NSLog(@"Logint button pressed");
[self performSegueWithIdentifier:@"ToMainApp" sender:sender];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[self setUsername_tf:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
EventsTableViewController.h
#import <UIKit/UIKit.h>
@interface EventsTableViewController : UITableViewController
{
NSString * username;
}
@property (nonatomic, retain) NSString * username;
@end
EventsTableViewController.m
#import "EventsTableViewController.h"
@interface EventsTableViewController()
@end
@implementation EventsTableViewController
@synthesize username;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
...
@end
该扔的例外是:
2012-03-15 14:19:27.304 StoryboardAssistance[30989:f803]
-[UINavigationController setUsername:]: unrecognized selector sent to instance 0x68abf60 2012-03-15 14:19:27.306
StoryboardAssistance[30989:f803] *** Terminating app due to uncaught
exception 'NSInvalidArgumentException', reason:
'-[UINavigationController setUsername:]: unrecognized selector sent to
instance 0x68abf60'
*** First throw call stack: (0x13c9022 0x155acd6 0x13cacbd 0x132fed0 0x132fcb2 0x28e6 0x43e4be 0xdb5ab 0x2974 0x13cae99 0x1614e 0x160e6
0xbcade 0xbcfa7 0xbc266 0x3b3c0 0x3b5e6 0x21dc4 0x15634 0x12b3ef5
0x139d195 0x1301ff2 0x13008da 0x12ffd84 0x12ffc9b 0x12b27d8 0x12b288a
0x13626 0x253d 0x24a5) terminate called throwing an exception(lldb)
有什么建议?
你可以做一个步骤调试,并找出它实际上崩溃的哪一行?另外''NSString * username = [[NSString alloc] initWithFormat:@“%@”,username_tf.text];'可以是'NSString * username = username_tf.text'。 – Gobot 2012-03-15 20:43:50
你可以更新故事板的图像吗?目前是404。谢谢 – cwiggo 2015-04-27 09:33:22