The controllers header file is as follows. As you can see I decalre
dbhost as a std::string, but dont initialise it.
The initalisation (which crashes) is done in the doLogin action method.
#import <Cocoa/Cocoa.h>
#include <string>
@interface CoreController : NSObject
{
//App Windows
IBOutlet NSWindow* loginwindow;
IBOutlet NSWindow* editwindow;
IBOutlet NSWindow* mainwindow;
IBOutlet NSWindow* aboutwindow;
//Login window outlets
IBOutlet NSTextField* dbhostUIfield;
IBOutlet NSTextField* usernameUIfield;
IBOutlet NSTextField* passwordUIfield;
IBOutlet NSTextField* dbnameUIfield;
IBOutlet NSTextField* dbportUIfield;
IBOutlet NSProgressIndicator* connectingspinner;
//Edit window outlets
IBOutlet NSTextField* internalhost;
IBOutlet NSTextField* internalport;
IBOutlet NSComboBox* subsystype;
IBOutlet NSTextField* externalhost;
IBOutlet NSButton* allinterfaces;
IBOutlet NSTextField* externalport;
IBOutlet NSButton* tcp;
IBOutlet NSButton* udp;
//Business logic instance vars
std::string dbhost;
std::string dbname;
std::string username;
std::string password;
int dbport;
}
-(IBAction)save:(id)sender;
-(IBAction)doLogin:(id)sender;
-(IBAction)showAboutPanel:(id)sender;
-(void)applicationDidFinishLaunching:(NSNotification*)aNotification;
@end
On 9 May 2009, at 13:34, Andrew Wood wrote:
Investigated it a bit further. It works if I declare the string in
the method where Im doing the assignment, but what I was trying to
do, and really need to do, is decalre the std::string in the app
controllers header file, so that its visible to all methods in the
controller, then do the assignment in an action method which is
called when a button is clicked.
On 8 May 2009, at 17:56, Drew Lawson wrote:
According to Alex Curylo:
On 8-May-09, at 8:55 AM, cocoa-dev-requ...@lists.apple.com wrote:
mycppstring = std::string([[myNSTextField stringValue]
UTF8String]);
But it keeps crashing. What's the recommended way?
I have no idea, but it works for me to simply assign it without the
constructor. Why, here's an example in the file I'm working on right
now, fancy that:
The only other gotcha I can think of (because it annoys me) is that
std::string does not play nice with null pointers. Is it possible
that stringValue returns nil?
Hmm, I had one other thought. There are several std::string
constructors, depending on the parameter type. In ObjC++, is it
unambiguous at compile time that the expression is "const char*"?
--
Drew Lawson | We were taking a vote when
| the ground came up and hit us.
| -- Cylon warrior
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