diff --git a/app/src/main/java/com/xiaojinzi/support/demo/App.kt b/app/src/main/java/com/xiaojinzi/support/demo/App.kt
index 986c624..c7f2774 100644
--- a/app/src/main/java/com/xiaojinzi/support/demo/App.kt
+++ b/app/src/main/java/com/xiaojinzi/support/demo/App.kt
@@ -17,6 +17,7 @@ import com.xiaojinzi.support.ktx.ComponentLifecycleCallback
 import com.xiaojinzi.support.ktx.LogSupport
 import com.xiaojinzi.support.ktx.MemoryCache
 import com.xiaojinzi.support.ktx.MemoryCacheConfig
+import com.xiaojinzi.support.ktx.findException
 import com.xiaojinzi.support.logger.AndroidLogAdapter
 import com.xiaojinzi.support.logger.Logger
 import kotlinx.coroutines.delay
diff --git a/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Exceptions.kt b/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Exceptions.kt
index fe67769..983d230 100644
--- a/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Exceptions.kt
+++ b/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Exceptions.kt
@@ -1,5 +1,7 @@
 package com.xiaojinzi.support.ktx
 
+import kotlin.reflect.KClass
+
 /**
  * 获取真实的错误
  */
@@ -10,4 +12,19 @@ val Throwable.realThrowable: Throwable
             throwable = throwable.cause!!
         }
         return throwable
-    }
\ No newline at end of file
+    }
+
+/**
+ * 会从顶端开始找是否是 [targetClass] 类型的异常, 找到就返回
+ */
+@Suppress("UNCHECKED_CAST")
+fun <T: Throwable> Throwable.findException(targetClass: KClass<T>): T? {
+    var throwable: Throwable? = this
+    while (throwable != null) {
+        if (targetClass.isInstance(throwable)) {
+            return throwable as T
+        }
+        throwable = throwable.cause
+    }
+    return null
+}
\ No newline at end of file
diff --git a/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Files.kt b/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Files.kt
index 8d73569..e1b7206 100644
--- a/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Files.kt
+++ b/lib-ktx/src/main/java/com/xiaojinzi/support/ktx/Files.kt
@@ -8,6 +8,7 @@ import java.io.File
  */
 suspend fun <T> File.deleteAfterUse(
     isDeleteAfterSuccess: Boolean = true,
+    // 这里这个应该默认也要是 true, 我的感觉是这样的
     isDeleteAfterError: Boolean = false,
     action: suspend (File) -> T
 ): T {