Latest iOS9 screenshots when encountered problems, iOS7 and iOS8 can run success。
I use iPad8.1.2 and iPhone6plus9.1 test, the following is my test the problems found。
2015-11-07 14:07:22.849 ScreenRecorder[3292:140825]
my device info：[iPhone OS,8.1.2,12B440,iPad4,1,prod]
(lldb) po framebufferService
8967
(lldb) po connect
IOMobileFramebuffer 0x138031800 [0x1946aec80]
(lldb) po ScreenSurface
IOSurface 0x137f00008 [0x1703816c0]
(lldb) po aseed
728041
(lldb) po Width
1536
(lldb) po Height
2048
2015-11-07 14:07:22.849 ScreenRecorder[3292:140825]
my device info：[iPhone OS,9.1,13B143,iPhone7,1,prod]
(lldb) po framebufferService
24599
(lldb) po connect
IOMobileFramebuffer 0x138031800 [0x1946aec80]
(lldb) po ScreenSurface
nil
(lldb) po aseed
0
(lldb) po Width
nil
(lldb) po Height
nil
Now problem caused iOS9 screenshots is a black screen。
Who can tell me where is wrong, thank you！
