xcode UIImagePickerController,检查相机
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UIImagePickerController,Check camera
提问by Paras Joshi
-(void)viewDidLoad
{
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
imagePicker = [[UIImagePickerController alloc] init];
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.showsCameraControls = NO;
[self.view addSubview:imagePicker.view];
}
else
{
// UIAlertView…
}
}
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
imagePicker.delegate = self;
[self presentViewController:imagePicker animated:NO completion:NO];
}
I want to put out an alert when you do not have a camera. IPhone app launch and move in this code. But, Crash (This Error >
我想在你没有相机时发出警报。iPhone 应用程序启动并在此代码中移动。但是，崩溃（此错误 >
return UIApplicationMain(argc, argv, nil, NSStringFromClass([CameraAppDelegate class])); > Thread 1: signal SIGABRT)when run in a simulator.
return UIApplicationMain(argc, argv, nil, NSStringFromClass([CameraAppDelegate class])); > Thread 1: signal SIGABRT)在模拟器中运行时。
Why is this?
为什么是这样？
回答by Paras Joshi
use this code and add UIImagePickerControllerDelegatedelegate in .hfile
使用此代码并UIImagePickerControllerDelegate在.h文件中添加委托
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
UIImagePickerController* picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
picker.wantsFullScreenLayout = YES;
[self presentModalViewController:picker animated:YES];
}
else
{
UIAlertView *altnot=[[UIAlertView alloc]initWithTitle:@"Camera Not Available" message:@"Camera Not Available" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
altnot.tag=103;
[altnot show];
[altnot release];
}
回答by Mehul Mistri
Create NSObject Class and name it like ClsGlobal, or the name you want..
创建 NSObject 类并将其命名为ClsGlobal，或者您想要的名称。
then write +(BOOL)isCameraDeviceAvailablein your ClsGlobal.hand implement below function in ClsGlobal.m.
然后写入+(BOOL)isCameraDeviceAvailable您的ClsGlobal.h并在ClsGlobal.m.
+(BOOL)isCameraDeviceAvailable
{
BOOL isCameraAvailable=NO;
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
if([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront] || [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear])
isCameraAvailable = YES;
}
return isCameraAvailable;
}
Use this class method, It will return YES if camera available else return NO.
使用这个类方法，如果相机可用则返回YES，否则返回NO。
Now you can call this method using [ClsGlobal isCameraDeviceAvailable];means your if Condition looks like if([ClsGlobal isCameraDeviceAvailable]).
现在，您可以使用[ClsGlobal isCameraDeviceAvailable];if 条件看起来像这样的方式调用此方法if([ClsGlobal isCameraDeviceAvailable])。
This method will help you throughout your project in any controller, You have to just import ClsGlobal like #import "ClsGlobal.h".
此方法将在任何控制器中帮助您完成整个项目，您只需导入 ClsGlobal 之类的#import "ClsGlobal.h".
