Ijkplayer: XCode 9: Main Thread Checker: UI API called on a background thread: -[UIView layer]

Created on 15 Sep 2017 · 14Comments · Source: bilibili/ijkplayer

XCode9 新增了Main thread checker，可以在secheme里面关闭，提示called on a background thread

环境：XCode 9
代码：k.0.8.3
资源：任意视频链接
日志：
```ijkmp_get_msg: FFP_MSG_PREPARED
ijkmp_get_meta_l
ijkmp_get_meta_l()=void
ijkmp_set_playback_rate(1.000000)
Playback rate: 1.000000
ijkmp_set_playback_rate()=void
ijkmp_set_playback_volume(1.000000)
ijkmp_set_playback_volume()=void
mediaIsPreparedToPlayDidChange
loadStateDidChange: MPMovieLoadStatePlayable--->Playing: 3
moviePlayBackStateDidChange 1: playing
Reinit context to 1920x1088, pix_fmt: yuv420p
no picture
no picture
no picture
aout_set_volume()
SDL_VoutFFmpeg_CreateOverlay(w=1920, h=1080, fmt=I420(0x30323449, dp=0x600000466540)
Video: first frame decoded
[GLES2] Version = OpenGL ES 2.0 APPLE-15.0.48
[GLES2] Vendor = Apple Inc.
[GLES2] Renderer = Apple Software Renderer
[GLES2] Extensions = GL_OES_depth_texture GL_OES_depth_texture_cube_map GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_vertex_array_object GL_EXT_blend_minmax GL_EXT_color_buffer_half_float GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_draw_instanced GL_EXT_instanced_arrays GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_pvrtc_sRGB GL_EXT_read_format_bgra GL_EXT_separate_shader_objects GL_EXT_shader_framebuffer_fetch GL_EXT_shader_texture_lod GL_EXT_shadow_samplers GL_EXT_sRGB GL_EXT_texture_filter_anisotropic GL_EXT_texture_rg GL_EXT_texture_storage GL_APPLE_clip_distance GL_APPLE_color_buffer_packed_float GL_APPLE_copy_texture_levels GL_APPLE_framebuffer_multisample GL_APPLE_rgb_422 GL_APPLE_sync GL_APPLE_texture_format_BGRA8888 GL_APPLE_texture_max_level GL_APPLE_texture_packed_float GL_IMG_read_format GL_IMG_texture_compression_pvrtc
create render yuv420p

use render yuv420p

Main Thread PID: 37473, Backtrace:
4 KwailyLivePlayer 5 KwailyLivePlayer 6 KwailyLivePlayer 7 KwailyLivePlayer 8 KwailyLivePlayer 9 KwailyLivePlayer 10 KwailyLivePlayer 11 KwailyLivePlayer 12 KwailyLivePlayer 13 KwailyLivePlayer 14 KwailyLivePlayer 15 KwailyLivePlayer 16 KwailyLivePlayer 17 KwailyLivePlayer 18 KwailyLivePlayer 19 libsystem_pthread.dylib 20 libsystem_pthread.dylib 21 libsystem_pthread.dylib ```
关闭检查的方法：
2017-09-15 3 56 18

Source

lrs0304

Most helpful comment

我也遇见了这个问题暂时先关闭了xcode Main Thread Checker 这个选项，想知道有没有更好的解决方式

4683

pod 'MCIJKPlayer'

poholo on 29 Apr 2019

👍2

All 14 comments

The same issue:
iOS 11 GM
XCode9 Beta

[reports] Main Thread Checker: UI API called on a background thread: -[UIView layer]
PID: 9067, TID: 3950540, Thread name: ff_vout, Queue name: com.apple.root.default-qos.overcommit, QoS: 21

IvanGrab on 15 Sep 2017

我也发现这个问题。。。但是这么解决？
关掉它？！

YaHoYii on 20 Sep 2017

@lrs0304 @IvanGrab @YaHoYii 请问大家怎么解决的

bhltyou on 21 Sep 2017

@bhltyou try run project with library on iOS 11 and XCode9, turn on "All Exception" breakpoint play some live video stream and i think Xcode will catch the row here is an issue.
and bring that method in main thread!

IvanGrab on 21 Sep 2017

👍2

@IvanGrab thanks a lot

bhltyou on 21 Sep 2017

@bhltyou 成功了吗？具体怎么修改的？