我想知道当某些条件为假时我们如何取消程序中的转场?
下面是我的代码片段:
if ([segue.identifier isEqualToString"Information Segue"])
{
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName"Login" inManagedObjectContext:self.managedObjectContext];
NSPredicate *predicate = [NSPredicate predicateWithFormat" ANY userid==%@ AND password==%@",_loginTextfield.text, _passwordTextField.text];
[request setEntity:entity];
[request setPredicate:predicate];
NSError *anyError=Nil;
NSArray *fetchedObjects = [self.managedObjectContext executeFetchRequest:request error:&anyError];
if ([fetchedObjects count] )
{
useridentered = _loginTextfield.text;
passwordentered = _passwordTextField.text;
InformationTVC *informationTVC = segue.destinationViewController;
informationTVC.managedObjectContext = self.managedObjectContext;
}
else
{
/* want to put my cancel the segue and remain in the login view */
}
}
如果有人可以指导我,那将是一个很大的帮助。
Best Answer-推荐答案 strong>
查看此线程:
Conditional segue performed on tap on UITableViewCell
基本上不是将您的 segue 直接链接到按钮,而是将其放在 View Controller 之间,并将按钮链接到 IBAction,该 IBAction 将有条件地调用函数 performSegueWithIdentifier
关于iphone - 如何以编程方式取消 segue 并保持在同一 View 中,我们在Stack Overflow上找到一个类似的问题:
https://stackoverflow.com/questions/9661190/
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