fix bug

Author: zhengwenming

PlayerDemo.xcworkspace/xcuserdata/wenming.xcuserdatad/UserInterfaceState.xcuserstate

@@ -3,54 +3,6 @@
    type = "0"
    version = "2.0">
    <Breakpoints>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "Yes"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "PlayerDemo/ViewControllers/DetailViewController.m"
-            timestampString = "515062750.595062"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "62"
-            endingLineNumber = "62"
-            landmarkName = "-wmplayer:clickedCloseButton:"
-            landmarkType = "7">
-         </BreakpointContent>
-      </BreakpointProxy>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "Yes"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "PlayerDemo/ViewControllers/DetailViewController.m"
-            timestampString = "515062762.711705"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "59"
-            endingLineNumber = "59"
-            landmarkName = "-wmplayer:clickedCloseButton:"
-            landmarkType = "7">
-         </BreakpointContent>
-      </BreakpointProxy>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "Yes"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "PlayerDemo/ViewControllers/DetailViewController.m"
-            timestampString = "515062767.618777"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "46"
-            endingLineNumber = "46"
-            landmarkName = "-preferredInterfaceOrientationForPresentation"
-            landmarkType = "7">
-         </BreakpointContent>
-      </BreakpointProxy>
       <BreakpointProxy
          BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
          <BreakpointContent

PlayerDemo.xcworkspace/xcuserdata/wenming.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

@@ -655,7 +655,9 @@ -(void)creatWMPlayerAndReadyToPlay{
     self.currentItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:self.URLString]];
 
     self.player = [AVPlayer playerWithPlayerItem:_currentItem];
-    self.player.automaticallyWaitsToMinimizeStalling = NO;
+    if ([self.player respondsToSelector:@selector(automaticallyWaitsToMinimizeStalling)]) {
+        self.player.automaticallyWaitsToMinimizeStalling = NO;
+    }
     self.player.usesExternalPlaybackWhileExternalScreenIsActive=YES;
     //AVPlayerLayer
     self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];