在版本10.2和11.0以下的 手机上，播放音乐 崩溃，APP闪退，但是在ios11 版本以上就不闪退，求助

[huangyanan423]

报错：

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'An instance 0x146b3070 of class DOUAudioStreamer was deallocated while key value observers were still registered with it. Current observation info: <NSKeyValueObservationInfo 0x1467d2c0> (
<NSKeyValueObservance 0x1479f9c0: Observer: 0x1467c4f0, Key path: status, Options: <New: YES, Old: NO, Prior: NO> Context: 0x78aa78, Property: 0x14656dc0>
<NSKeyValueObservance 0x147e3fc0: Observer: 0x1467c4f0, Key path: duration, Options: <New: YES, Old: NO, Prior: NO> Context: 0x78aa7c, Property: 0x147e3fa0>
<NSKeyValueObservance 0x147e4510: Observer: 0x1467c4f0, Key path: bufferingRatio, Options: <New: YES, Old: NO, Prior: NO> Context: 0x78aa80, Property: 0x147e44f0>
)'
*** First throw call stack:
(0x1c9b7b3d 0x1bc3f067 0x1c9b7a85 0x1d276729 0x1bc59259 0x209553 0x209793 0x1c23c93b 0x1c23c85d 0x1c23a468)

[huangyanan423]

好吧，在初始化streamer 时，添加

@Try {
[self removeStreamerObserver];
} @catch(id anException){
}

就好了