diff --git a/core/Node/Text.cpp b/core/Node/Text.cpp
index 668e95b5..c376fb2b 100644
--- a/core/Node/Text.cpp
+++ b/core/Node/Text.cpp
@@ -101,9 +101,16 @@ UINT32 e2d::Text::getColor() const
 
 int e2d::Text::getLineCount() const
 {
-	DWRITE_TEXT_METRICS metrics;
-	m_pDWriteTextLayout->GetMetrics(&metrics);
-	return static_cast<int>(metrics.lineCount);
+	if (m_pDWriteTextLayout)
+	{
+		DWRITE_TEXT_METRICS metrics;
+		m_pDWriteTextLayout->GetMetrics(&metrics);
+		return static_cast<int>(metrics.lineCount);
+	}
+	else
+	{
+		return 0;
+	}
 }
 
 bool e2d::Text::isItalic() const
diff --git a/core/etool.h b/core/etool.h
index ab342cd8..6b45cece 100644
--- a/core/etool.h
+++ b/core/etool.h
@@ -18,6 +18,9 @@ public:
 	template<typename T>
 	static inline T range(T min, T max) { return e2d::Random::randomInt(min, max); }
 
+	// 取得浮点数范围内的一个随机数
+	static inline double range(float min, float max) { return e2d::Random::randomReal(min, max); }
+
 	// 取得浮点数范围内的一个随机数
 	static inline double range(double min, double max) { return e2d::Random::randomReal(min, max); }