小编Nit*_*thu的帖子

<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"



package="com.fitnesscircle.snapo">


<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />


<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">


    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>


<activity
    android:name="com.afollestad.materialcamera.CaptureActivity"
    android:label="@string/app_name"
    android:theme="@style/MaterialCamera.CaptureActivity" />
<activity
    android:name="com.afollestad.materialcamera.CaptureActivity2"
    android:theme="@style/MaterialCamera.CaptureActivity" />
<activity
    android:name="com.afollestad.materialcamera.MaterialCamera"
     />

即使我注册它仍然说找不到明确的活动类。我是 Android 编码新手。我需要改变什么所以我摆脱了这个 ActivityNotFoundException

无法找到显式活动类 {com.fitnesscircle.snapo/com.afollestad.materialcamera.CaptureActivity}；您是否在 AndroidManifest.xml 中声明了此活动

请帮忙

我想从核心数据中获取不同的日期。使用此代码 fetchRequest.returnsDistinctResults = true 不起作用。它仍然显示所有值。

guard let appDelegate =
          UIApplication.shared.delegate as? AppDelegate else {
            return
        }
    
    let managedContext = appDelegate.persistentContainer.viewContext
    let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "Journal")
    
    
    fetchRequest.propertiesToFetch = ["dateAsNumber"]
    fetchRequest.returnsDistinctResults = true

    do {
    
        dateListSquare = try managedContext.fetch(fetchRequest)
        
    } catch let error as NSError {
      
        print("Could not fetch. \(error), \(error.userInfo)")
    }