小编Mec*_*han的帖子

我正在尝试将Google地图添加到may app中,所以我已经使用了API密钥.不幸的是,当我通过元数据标签在manifest.xml中插入API密钥时,它会在编译时自动插入另一个元数据标记,如下所示.现在它产生下面提到的错误.最糟糕的情况是,即使我删除它们中的每一个或两者,它也会在编译时自动生成两个标记并抛出错误.

有帮助吗？

错误

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.exampl.t_collect/com.exampl.t_collect.activity.MapActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2389)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2441)
        at android.app.ActivityThread.access$900(ActivityThread.java:151)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
.........
Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
..........
Caused by: java.lang.RuntimeException: The API key can only be specified once. It is recommended that you use the meta-data tag with the name: com.google.android.geo.API_KEY in the <application> element of AndroidManifest.xml …

我有iPhone应用程序覆盖相机与自定义视图.我有一个按钮在相机闪光模式之间切换,这是代码

switch ([self.imagePickerController cameraFlashMode]) {
    case UIImagePickerControllerCameraFlashModeAuto:
        [self.imagePickerController setCameraFlashMode:UIImagePickerControllerCameraFlashModeOn];
        return @"On";
        break;

    case UIImagePickerControllerCameraFlashModeOn:
        [self.imagePickerController setCameraFlashMode:UIImagePickerControllerCameraFlashModeOff];
        return @"Off";
        break;

    case UIImagePickerControllerCameraFlashModeOff:
        [self.imagePickerController setCameraFlashMode:UIImagePickerControllerCameraFlashModeAuto];
        return @"Auto";
        break;

    default:
        break;
}

这是我的问题:在iOS 7.0x上工作得很好,但在iOS 7.1中,cameraFlashMode属性返回UIImagePickerControllerCameraFlashModeAuto,无论其真实状态如何.

闪光模式确实发生了变化,但我没有注意到这一点.有线索吗？谢谢

我想要一种简单的方法来在一个方法的开头删除代码,该方法将强制该方法仅在主线程上运行(因为该方法更新了UI元素).

目前,我有类似的东西:

 if (![NSThread isMainThread]){
    [self performSelectorOnMainThread:_cmd withObject:_results waitUntilDone:NO];
    return;
}

但是我想要一种方法将它包含在一个宏中而不必输入方法的参数.看起来应该有一些方法来迭代传递给当前方法的参数列表并创建一个NSInvocation或类似的.有什么想法吗？