UINavigation控制器的UIViewController和UItoolbar作爲一個子視圖的問題

Question

嘿，大家好我試圖離開增強現實並轉到下一個視圖控制器到我的導航控制器

的代碼是從ARKit演示，我只是增加了編程方式UIToolbar作爲具有操作按鈕..我一個子視圖想這個按鈕導致我現有的導航控制器的下一個視圖控制器。動作takePicture：被執行，因爲我有一個的NSLog消息，但新的ViewController未添加

這是的ARGeoViewController.h

#import <Foundation/Foundation.h> 

#import "ARViewController.h" 
#import "AfterARViewController.h" 


@interface ARGeoViewController : ARViewController { 
CLLocation *centerLocation; 
AfterARViewController *afterARViewController; 

} 

@property (nonatomic, retain) CLLocation *centerLocation; 
- (IBAction)takePicture:(id)sender; 
@property (nonatomic, retain) AfterARViewController *afterARViewController; 

@end 

這個代碼是ARGeoViewController.m

的代碼

#import "ARGeoViewController.h" 

#import "ARGeoCoordinate.h" 
#import "ARViewController.h" 

@implementation ARGeoViewController 

@synthesize centerLocation; 

@synthesize afterARViewController; 


- (void)setCenterLocation:(CLLocation *)newLocation { 
[centerLocation release]; 
centerLocation = [newLocation retain]; 

for (ARGeoCoordinate *geoLocation in self.coordinates) { 
    if ([geoLocation isKindOfClass:[ARGeoCoordinate class]]) { 
     [geoLocation calibrateUsingOrigin:centerLocation]; 

     if (geoLocation.radialDistance > self.maximumScaleDistance) { 
      self.maximumScaleDistance = geoLocation.radialDistance; 
     } 
    } 
} 

} 
    -(void)viewWillAppear:(BOOL)animated{ 

UIToolbar *toolbar = [UIToolbar new]; 
toolbar.barStyle = UIBarStyleBlackTranslucent; 


// create a bordered style button with custom title 
UIBarButtonItem *playItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera 
                      target:self 
                      action:@selector(takePicture:)] autorelease]; 


NSArray *items = [NSArray arrayWithObjects: 
        playItem, 
        nil]; 
toolbar.items = items; 

// size up the toolbar and set its frame 
// please not that it will work only for views without Navigation toolbars. 
[toolbar sizeToFit]; 
CGFloat toolbarHeight = [toolbar frame].size.height; 
CGRect mainViewBounds = self.view.bounds; 
[toolbar setFrame:CGRectMake(CGRectGetMinX(mainViewBounds), 
          CGRectGetMinY(mainViewBounds) + CGRectGetHeight(mainViewBounds) - (toolbarHeight), 
          CGRectGetWidth(mainViewBounds), 
          toolbarHeight)]; 

[self.view addSubview:toolbar]; 


} 

- (IBAction)takePicture:(id)sender 
{ 
NSLog(@"takepicture"); 
if(self.afterARViewController == nil) 
{ 
    AfterARViewController *afterARController = [[AfterARViewController alloc] 
                initWithNibName:@"AfterARViewController" bundle:[NSBundle mainBundle]]; 
    self.afterARViewController = afterARController; 
    [afterARController release]; 
    [cameraController release]; 


} 

[self.navigationController pushViewController:self.afterARViewController animated:YES]; 

    } 


    @end 

謝謝你這麼多

Answer 1

我不跟ARKit經驗豐富，但cameraController導航控制器的堆棧的一部分？當你這樣做的時候釋放它，你可能會丟掉東西。就像測試一樣，嘗試註釋釋放cameraController的代碼行，看看它是否會影響這一點。

此外，FWIW我早就料到你的使用設置工具欄是在viewDidLoad中，不viewDidAppear代碼。