对于R中的对角矩阵，用1代替0，反之亦然(replace 0's with 1's and vice versa for a diagonal matrix in R)

 您可以直接从storyboard调用viewController并传递数据，而不是prepareForSegue 
 
 在要传递数据的文件中声明变量，并#import要传递数据的头文件。 
 
#import "file.h"

file *data = [[file alloc]init];
data.index = add_index;
 
 然后导航如下... 
 
UINavigationController *navigationController = (UINavigationController *)self.navigationController;
UIViewController *createEvent = [self.storyboard instantiateViewControllerWithIdentifier:@"yourViewControllerID"];

[navigationController pushViewController:createEvent animated:YES];

Rather than prepareForSegue you can directly call viewController from storyboard and pass the data
 
declare variable in the file you want to pass the data and #import the header file in which you want to pass the data.
 
#import "file.h"

file *data = [[file alloc]init];
data.index = add_index;
 
then navigate as follow...
 
UINavigationController *navigationController = (UINavigationController *)self.navigationController;
UIViewController *createEvent = [self.storyboard instantiateViewControllerWithIdentifier:@"yourViewControllerID"];

[navigationController pushViewController:createEvent animated:YES];