[英]Execute function to call performSegueWithIdentifier from another class
[英]Is it possible to call a performSegueWithIdentifier from another class?
我只是建立一个类来正确管理我的数据库和JSON请求。 现在的问题是,我该如何执行搜寻?
这是我认为的代码:
- (IBAction)loginClick:(id)sender
{
NSString *post = [NSString stringWithFormat:@"username=test&password=test"];
[[DataManagement sharedManager] WebServiceLogin:post];
}
- (void) showTypeView
{
[self performSegueWithIdentifier:@"showTypeView" sender:nil];
}
在我的课上:
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
...
switch ([[response valueForKey:@"success"] intValue])
{
case 0:
{
NSLog(@"error: %@ error Description: %@", [response valueForKey:@"success"], [response valueForKey:@"error_message"]);
break;
}
case 1:
{
LoginViewController *showView = [LoginViewController new];
[showView showTypeView];
break;
}
default:
break;
}
...
}
启动时出现错误:**
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Receiver (<LoginViewController: 0x165afd30>) has no segue with identifier 'showTypeView''
*** First throw call stack:
(0x2592e2eb 0x250fadff 0x29e2b037 0xe1819 0xdb64f 0x25f64de1 0x25f64d99 0x25f64e8d 0x25e261ef 0x25edf04f 0xa77cab 0xa7f835 0x25e171e3 0x258415f9 0x25e170cb 0x25e16f95 0x25e16e29 0x258f1257 0x258f0e47 0x258ef1af 0x25841bb9 0x258419ad 0x26abbaf9 0x29b2dfb5 0xe3ea9 0x254f4873)
libc++abi.dylib: terminating with uncaught exception of type NSException
**
如果您使用的是segueWithIdentifier,则需要已经在Storyboard中内置了segue,并将其正确标记为“ showTypeView”。 否则,您应该使用导航控制器来推送视图控制器,或者使用self presentViewController来显示模式视图控制器。
编辑:基于Larme的注释,您可以像这样构建一个委托:
// In your class.h file
@property (weak, nonatomic)id<SegueDelegate> delegate;
// In class.m file
LoginViewController *showView = [LoginViewController new];
self.delegate = showView;
[self.delegate segue];
// In LoginViewController.h
@protocol SegueDelegate
-(void)segue;
@end
@interface LoginViewController: UIViewController <SegueDelegate>
-(void)segue;
@end
// In LoginViewController.m
@implementation LoginViewController
-(void)segue
{
[self performSegueWithIdentifier:@"showTypeView" sender:nil];
}
@end
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