diff --git a/README.md b/README.md
index 7bf89fa..c2105e1 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # XHFloatWindow
-slight floating window plugin for iOS apps(iPhone only)
+slight floating window plugin for iOS apps
 
 ![](http://img.blog.csdn.net/20161110170919449?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center)
 
diff --git a/XHFloatingWindow/FloatingWindowPlugin/XHDraggableButton.m b/XHFloatingWindow/FloatingWindowPlugin/XHDraggableButton.m
index 3064884..48b94ce 100644
--- a/XHFloatingWindow/FloatingWindowPlugin/XHDraggableButton.m
+++ b/XHFloatingWindow/FloatingWindowPlugin/XHDraggableButton.m
@@ -53,7 +53,7 @@ - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
 - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
     UITouch *touch = [touches anyObject];
     CGPoint curPoint = [touch locationInView:_rootView];
-    curPoint = [self ConvertDir:curPoint];
+    if(IS_IPHONE) curPoint = [self ConvertDir:curPoint];
     // if the start touch point is too close to the end point, take it as the click event and notify the click delegate
     if (pow((_touchStartPosition.x - curPoint.x),2) + pow((_touchStartPosition.y - curPoint.y),2) < 1) {
         [self.buttonDelegate dragButtonClicked:self];
@@ -74,9 +74,9 @@ -(void)buttonAutoAdjust:(CGPoint)curPoint {
     }
     // distances to the four screen edges
     CGFloat left = curPoint.x;
-    CGFloat right = W - curPoint.x;
+    CGFloat right = IS_IPHONE ? (W - curPoint.x) : (xh_ScreenW - curPoint.x);
     CGFloat top = curPoint.y;
-    CGFloat bottom = H - curPoint.y;
+    CGFloat bottom = IS_IPHONE ? (H - curPoint.y) : (xh_ScreenH - curPoint.y);
     // find the direction to go
     xh_FloatWindowDirection minDir = xh_FloatWindowLEFT;
     CGFloat minDistance = left;
@@ -130,15 +130,15 @@ - (void)buttonRotate {
             break;
         case xh_Change2Left:
             self.transform = _originTransform;
-            self.transform = CGAffineTransformMakeRotation(-M_PI_2);
+            self.transform = CGAffineTransformMakeRotation(-90*M_PI/180.0);
             break;
         case xh_Change2Right:
             self.transform = _originTransform;
-            self.transform = CGAffineTransformMakeRotation(M_PI_2);
+            self.transform = CGAffineTransformMakeRotation(90*M_PI/180.0);
             break;
         case xh_Change2Upside:
             self.transform = _originTransform;
-            self.transform = CGAffineTransformMakeRotation(M_PI);
+            self.transform = CGAffineTransformMakeRotation(180*M_PI/180.0);
             break;
         default:
             break;