0
我在導航堆棧上有兩個視圖控制器。在第一個視圖控制器中，我有一個方法顯示一個提醒去一個網站，並遠離應用程序。如果他們點擊NO，則沒有任何反應，如果是，則打開鏈接。這一切都有效。我現在的問題是，如果我想從導航堆棧上的第二個視圖控制器調用此方法，我的第一個視圖控制器將會分配，並且委託永遠不會被調用。這是一些正在發生的僞代碼。對象在UIAlertView代表被調用之前得到釋放
在SecondViewcontroller：
- (void)TargetSelectionPressed:(NSNotification *)notification {
FirstViewController *dummyCtlr = nil;
BOOL shouldPushToFistCtlr = NO;
NSArray *controllers = [[NSArray alloc] initWithArray:[self.navigationController viewControllers]];
for (UIViewController *ctlr in controllers) {
if ([ctlr isKindOfClass:[FirstViewController class]]) {
dummyCtlr = (FirstViewController *)ctlr;
break;
}
}
if (dummyCtlr == nil) {
FirstViewController *gtc = [[[FirstViewController alloc] init] autorelease];
dummyCtlr = gtc;
shouldPushToFistCtlr = YES;
}
switch (targetSelection) {
case TARGET_LOCATION:
break;
case TARGET_CONDITION: {
if (shouldPushToGTC) {
[self.navigationController pushViewController:dummyCtlr animated:YES];
}
else {
[self.navigationController popToViewController:dummyCtlr animated:YES];
}
break;
}
case TARGET_LINK: {
[dummyCtlr BuildURL:link];
break;
}
default:
break;
}
[controllers release];
}
FirstViewcontroller
- (void)BuildURL:(NSString*)link {
self.ExternalLink = link; NSString *message = [[NSString alloc] initWithFormat:@"Would you like to open %@ in Safari?", link];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Open Safari" message:message delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
[alert show];
self.SafariAlertView = alert;
self.SafariAlertView.delegate = self;
[alert release];
[message release];
}
- (void)dealloc {
[safariAlertView release];
self.SafariAlertView.delegate = nil;
[super dealloc];
}