ios – 源类型1不可用

概述我有一个iPhone和iPad的应用程序，当我尝试在UIPopoverController中为iPad加载一个UIPickerViewController时，我得到异常“源类型1不可用”。 即使使用设备也能解决问题。 @try { if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSource 我有一个iPhone和iPad的应用程序，当我尝试在UIPopoverController中为iPad加载一个UIPickerVIEwController时，我得到异常“源类型1不可用”。
即使使用设备也能解决问题。

@try {    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])  {        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;        imagePicker.delegate = self;        imagePicker.allowsEditing = NO;        self.tempComp = component;        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {            [self presentModalVIEwController:imagePicker animated:YES];        }else {            // We are using an iPad            popoverController=[[UIPopoverController alloc] initWithContentVIEwController:imagePicker];            popoverController.delegate = self;            [popoverController presentPopoverFromrect:component.bounds inVIEw:component permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];        }    }else{        UIAlertVIEw *alert = [[UIAlertVIEw alloc] initWithTitle:@"Camera Non disponibile" message:@"La camera non è disponibile" delegate:self cancelbuttonTitle:@"Ok" otherbuttonTitles: nil];        [alert show];    }}@catch (NSException *exception) {    NSLog(@"Cattura eccezione %@",exception);    UIAlertVIEw *alert = [[UIAlertVIEw alloc] initWithTitle:@"Eccezione" message:[Nsstring stringWithFormat:@"%@",exception] delegate:self cancelbuttonTitle:@"Ok" otherbuttonTitles: nil];    [alert show];}

解决方法 这是因为你在模拟器上打开相机
因为代码就像[UIImagePickerController isSourceTypeAvailable：UIImagePickerControllerSourceTypeCamera]
显然模拟器没有相机…
继续发出这样的警报，

if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {    UIAlertVIEw *myAlertVIEw = [[UIAlertVIEw alloc] initWithTitle:@"Error"                                                          message:@"Device has no camera"                                                         delegate:nil                                                cancelbuttonTitle:@"OK"                                                otherbuttonTitles: nil];    [myAlertVIEw show];}else{//other action}

没关系，它会正常工作在设备上！

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