小编Ama*_*007的帖子

在我的应用程序中,我正在使用以下编码模式来振动我的iPhone设备

包括:AudioToolbox框架

头文件:

#import "AudioToolbox/AudioServices.h"

码:

AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);  

我的问题是,当我运行我的应用程序时,它会振动,但只有第二次,但我希望它会持续振动直到我停止它.

怎么可能呢？

在我的应用程序中,我使用UIImagePickerControllerCropRect裁剪图像,但我想减少自动出现的iphone裁剪盒的大小,以便我的图像裁剪到我想要的完美尺寸.我正在使用以下代码:

-(IBAction) getPhoto:(id) sender {
    UIImagePickerController * picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;

    if((UIButton *) sender == choosePhotoBtn) {
        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
        picker.allowsImageEditing = YES;
    } else {
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }

    [self presentModalViewController:picker animated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {
    [picker dismissModalViewControllerAnimated:YES];

    imageView.image = image;
    CGSize size = [imageView.image size];
    CGRect cropRect = CGRectMake(0.0, 0.0, size.width, size.height);
    NSLog(@"Original image size = (%f, %f)", size.width, size.height);

    NSValue *cropRectValue = [editingInfo objectForKey:@"UIImagePickerControllerCropRect"];
    cropRect = [cropRectValue CGRectValue]; …

在这里,我正在粘贴我的代码,我想从我的test-Info.plist中检索Bundle版本.

@interface testViewController : UIViewController {
    UILabel *label;
}
@property(nonatomic,retain) IBOutlet    UILabel *label;

@end

@implementation testViewController

@synthesize label;

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"test-info" ofType:@"plist"];

    NSString *versionString = [NSString stringWithFormat:@"v%d", [plistData objectForKey:@"Bundle version"]];

    label.text = versionString;
}

@end

但在我错了的地方,我仍然得到零值

我正在开发一个项目,我以下面的方式调用其他viewcontroller: -

AppDelegate *app2 = (AppDelegate *)[[UIApplication sharedApplication]delegate];
[self.navigationController pushViewController:app2.SecondForm animated:NO];
app2 =nil;

我的应用程序是基于导航的,我在导航栏上创建了我的后退按钮

-(void)viewDidLoad
{
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarStyleBlackOpaque target:self action:@selector(Back:)];
}

通过这种方式我的后退动作将调用点击

-(IBAction)Back:(id)sender
{
     // What code I will write over here to get the same functionality
     // which is by default given by navigation controller?
}