如何在 imagePickerController:didFinishPickingMediaWithInfo 之后更改视图（XIB）？

Question

我是 iPhone 和 Objective-C 开发的新手。

我想知道相机拍照后如何更改视图（XIB 文件）。

有人可以帮助我或分享一些代码吗？我一周以来一直在寻找这个:( 完成应用程序后，我准备分享我的项目和/或制作教程。

有关我的应用程序的信息：我想扫描条形码并将条形码保存在我的应用程序中。 为了扫描条形码，我使用 ZBarSDK。 我有一个 TabBarController，在第一个选项卡上，我可以打开相机。 扫描过程结束后，我想跳到第二个选项卡（另一个 XIB 文件）并显示结果。

感谢您的任何帮助。

这是我的第一个选项卡 (ScanCodeViewController) 的代码：

.h

#import < UIKit/UIKit.h >

@class OutPutCodeViewController;

@interface ScanCodeViewController : UIViewController <ZBarReaderDelegate> {
 IBOutlet UIImageView *img;
 OutPutCodeViewController *output;         
}


@property (nonatomic, retain) IBOutlet UIImageView *img;
@property (nonatomic, retain) OutPutCodeViewController *output;

- (IBAction) scanButton;

@end

.m

#import "ScanCodeViewController.h"


@implementation ScanCodeViewController

@synthesize img;
@synthesize output;


- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}


- (void)dealloc {
[img release];
[super dealloc];
}


- (IBAction) scanButton {
 NSLog(@"Scanbutton wurde geklickt!");

 ZBarReaderViewController *reader = [ZBarReaderViewController new];
 reader.readerDelegate = self;

 ZBarImageScanner *scanner = reader.scanner;

 [scanner setSymbology: ZBAR_I25 config: ZBAR_CFG_ENABLE to: 0];

 [self presentModalViewController:reader animated: YES];
 [reader release];
 }


- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
 NSLog(@"Entered imagePickerController");


 // ADD: get the decode results
 id<NSFastEnumeration> results = [info objectForKey: ZBarReaderControllerResults];
 ZBarSymbol *symbol = nil;
 for(symbol in results) {
 break;
 }

 img.image = [info objectForKey:UIImagePickerControllerOriginalImage];
 [reader dismissModalViewControllerAnimated: YES];


 //[self presentModalViewController:output animated:YES]; //by using this, app chrashes 

}


- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
 [picker dismissModalViewControllerAnimated: YES];

}


@end  

这里是第二个选项卡 (OutPutCodeViewController)

.h

#import <UIKit/UIKit.h>


@interface OutPutCodeViewController : UIViewController {
 IBOutlet UIImageView *resultImage;
 IBOutlet UITextField *resultText;
}

@property (nonatomic, retain) IBOutlet UIImageView *resultImage;
@property (nonatomic, retain) IBOutlet UITextField *resultText;


@end

.m

#import "OutPutCodeViewController.h"


@implementation OutPutCodeViewController

@synthesize resultImage;
@synthesize resultText;


- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}


- (void)dealloc {
 [resultImage release];
 [resultText release];

[super dealloc];
}


@end

Answer 1

知道了！

无法设置更多动画：是。
这是示例和正确的代码。

我希望它对其他人有帮助。

- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{

    // ADD: get the decode results
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;

[reader dismissModalViewControllerAnimated: NO];

    TableDetailViewController *tc = [[TableDetailViewController alloc]         initWithNibName:@"TableDetailViewController" bundle:nil];
    tc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:tc animated:YES];
    [tc release];   

}

刷子51

Answer 2

在 didFinishPickingMediaWithInfo 中，您应该调用 [self.tabBarController setSelectedIndex:1] 切换到第二个选项卡。