【问题标题】:Enabling restrictions for camera in iPad throws NSException while opening camera在 iPad 中启用相机限制会在打开相机时引发 NSException
【发布时间】:2014-02-19 09:51:43
【问题描述】:

我在 iPad 的设置和隐私选项卡中启用了限制并禁止使用相机和 FaceTime,我为我的应用程序禁用了对照片的访问。

我正在使用以下代码打开相机和照片库,

//For camera
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
picker.allowsEditing = NO;
[self.view.window.rootViewController presentViewController:picker animated:YES completion:nil];

//For Photo library
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
picker.allowsEditing = NO;
[self.view.window.rootViewController presentViewController:picker animated:YES completion:nil];

在打开照片库时,它会清楚地显示一条访问被拒绝的消息,并且可以在设置应用程序中进行更改。但是在打开相机时,应用程序崩溃并抛出错误,

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Source type 1 not available' *** First throw call stack: (0x30584f4b 0x3ac566af 0x32f56d69 0x1141d9 0x32ee4d03 0x32d2c713 0x32d2c6b3 0x32d2c691 0x32d1811f 0x32d2c107 0x32d2bdd9 0x32d26e65 0x32cfc79d 0x32cfafa3 0x30550183 0x3054f653 0x3054de47 0x304b8c27 0x304b8a0b 0x3518c283 0x32d5c049 0xeff7d 0x3b15eab7) libc++abi.dylib: terminating with uncaught exception of type NSException

如何解决这个问题?

【问题讨论】:

    标签: ios cocoa-touch camera settings nsexception


    【解决方案1】:

    您应该始终检查源类型是否可用:

    来自 Apple UIImagePickerController doucmentatiom

    验证设备是否能够从所需的内容中挑选内容 来源。调用isSourceTypeAvailable: 类方法执行此操作, 提供来自UIImagePickerControllerSourceType 的常量 枚举。

    检查源是否可用,例如:

    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypePhotoLibrary]) {
     // UIImagePickerControllerSourceTypePhotoLibrary is available.
    }
    

    【讨论】:

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