diff --git a/Assets/first/ui/first.prefab b/Assets/first/ui/first.prefab
index a943c8673..4908d560c 100644
--- a/Assets/first/ui/first.prefab
+++ b/Assets/first/ui/first.prefab
@@ -205,7 +205,7 @@ RectTransform:
   m_AnchorMin: {x: 0.5, y: 0.8601685}
   m_AnchorMax: {x: 0.5, y: 0.8601685}
   m_AnchoredPosition: {x: 0, y: 0}
-  m_SizeDelta: {x: 475, y: 296}
+  m_SizeDelta: {x: 471, y: 236}
   m_Pivot: {x: 0.5, y: 1}
 --- !u!222 &2393798849200291726
 CanvasRenderer:
@@ -367,7 +367,7 @@ RectTransform:
   m_AnchorMin: {x: 0.5, y: 0.8601685}
   m_AnchorMax: {x: 0.5, y: 0.8601685}
   m_AnchoredPosition: {x: 0, y: 0}
-  m_SizeDelta: {x: 475, y: 296}
+  m_SizeDelta: {x: 471, y: 236}
   m_Pivot: {x: 0.5, y: 1}
 --- !u!222 &4234644678276498588
 CanvasRenderer:
@@ -1085,7 +1085,7 @@ RectTransform:
   m_AnchorMin: {x: 0.5, y: 0.8601685}
   m_AnchorMax: {x: 0.5, y: 0.8601685}
   m_AnchoredPosition: {x: 0, y: 0}
-  m_SizeDelta: {x: 475, y: 296}
+  m_SizeDelta: {x: 471, y: 236}
   m_Pivot: {x: 0.5, y: 1}
 --- !u!222 &1150403572733026150
 CanvasRenderer:
diff --git a/Assets/first/ui/login_cn.png.meta b/Assets/first/ui/login_cn.png.meta
index 6b6454239..c7dd7c366 100644
--- a/Assets/first/ui/login_cn.png.meta
+++ b/Assets/first/ui/login_cn.png.meta
@@ -50,7 +50,7 @@ TextureImporter:
   spriteBorder: {x: 0, y: 0, z: 0, w: 0}
   spriteGenerateFallbackPhysicsShape: 1
   alphaUsage: 1
-  alphaIsTransparency: 0
+  alphaIsTransparency: 1
   spriteTessellationDetail: -1
   textureType: 0
   textureShape: 1
@@ -99,6 +99,18 @@ TextureImporter:
     overridden: 0
     androidETC2FallbackOverride: 0
     forceMaximumCompressionQuality_BC6H_BC7: 0
+  - serializedVersion: 3
+    buildTarget: iPhone
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 1
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
   spriteSheet:
     serializedVersion: 2
     sprites: []
diff --git a/Assets/first/ui/login_en.png.meta b/Assets/first/ui/login_en.png.meta
index 8992473a2..69759b3dc 100644
--- a/Assets/first/ui/login_en.png.meta
+++ b/Assets/first/ui/login_en.png.meta
@@ -50,7 +50,7 @@ TextureImporter:
   spriteBorder: {x: 0, y: 0, z: 0, w: 0}
   spriteGenerateFallbackPhysicsShape: 1
   alphaUsage: 1
-  alphaIsTransparency: 0
+  alphaIsTransparency: 1
   spriteTessellationDetail: -1
   textureType: 0
   textureShape: 1
@@ -99,6 +99,18 @@ TextureImporter:
     overridden: 0
     androidETC2FallbackOverride: 0
     forceMaximumCompressionQuality_BC6H_BC7: 0
+  - serializedVersion: 3
+    buildTarget: iPhone
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 1
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
   spriteSheet:
     serializedVersion: 2
     sprites: []
diff --git a/Assets/first/ui/login_zh.png.meta b/Assets/first/ui/login_zh.png.meta
index 35c0a796a..2e9527940 100644
--- a/Assets/first/ui/login_zh.png.meta
+++ b/Assets/first/ui/login_zh.png.meta
@@ -50,7 +50,7 @@ TextureImporter:
   spriteBorder: {x: 0, y: 0, z: 0, w: 0}
   spriteGenerateFallbackPhysicsShape: 1
   alphaUsage: 1
-  alphaIsTransparency: 0
+  alphaIsTransparency: 1
   spriteTessellationDetail: -1
   textureType: 0
   textureShape: 1
@@ -99,6 +99,18 @@ TextureImporter:
     overridden: 0
     androidETC2FallbackOverride: 0
     forceMaximumCompressionQuality_BC6H_BC7: 0
+  - serializedVersion: 3
+    buildTarget: iPhone
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 1
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
   spriteSheet:
     serializedVersion: 2
     sprites: []