ios - 选择索引处的对象时执行EXC BAD指令

Question

当选择索引处的对象时，我得到EXC BAD INSTRUCTION。我真的找不到这个问题的任何重复之处。请帮我诊断一下。

崩溃降落在这里/主线程:

int main(int argc, char * argv[])
{
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }

这是线程2:

libsystem_kernel.dylib`kevent64:
0x10e486224:  movl   $0x2000171, %eax
0x10e486229:  movq   %rcx, %r10
0x10e48622c:  syscall 
0x10e48622e:  jae    0x10e486238               ; kevent64 + 20
0x10e486230:  movq   %rax, %rdi
0x10e486233:  jmp    0x10e480ca3               ; cerror_nocancel
0x10e486238:  retq   
0x10e486239:  nop    
0x10e48623a:  nop    
0x10e48623b:  nop

这也是:

libdispatch.dylib`_dispatch_mgr_thread:
0x10e121f9f:  pushq  %rbp
0x10e121fa0:  movq   %rsp, %rbp
0x10e121fa3:  subq   $0x800, %rsp
0x10e121faa:  callq  0x10e121fd5               ; _dispatch_mgr_init
0x10e121faf:  callq  0x10e1345c0               ; symbol stub for: pthread_self
0x10e121fb4:  movq   %rax, %rdi
0x10e121fb7:  callq  0x10e1345a2               ; symbol stub for: pthread_get_stackaddr_np
0x10e121fbc:  leaq   -0x7f8(%rbp), %rdi
0x10e121fc3:  subq   %rdi, %rax
0x10e121fc6:  xorl   %esi, %esi
0x10e121fc8:  movq   %rax, %rdx
0x10e121fcb:  callq  0x10e1343a4               ; symbol stub for: memset
0x10e121fd0:  callq  0x10e122139               ; _dispatch_mgr_invoke

这是有问题的方法:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSURL *selectedSermon = [[NSURL alloc]initWithString:[[sermons objectAtIndex:indexPath.row]urlForAudioSermon]];
    AVAsset *asset = [AVURLAsset URLAssetWithURL:selectedSermon options:nil];
    AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:asset];

    player = [AVPlayer playerWithPlayerItem:playerItem];

    [player play];

}

请。如果您需要我提供更多信息，请告诉我。

Answer 1

您可以让Xcode定位崩溃点:

在Xcode菜单“Debug / Breakpoints”中选择“Create Exception Breakpoint”，然后单击运行，Xcode将在导致应用程序崩溃的行停止。

还要检查一下:
Exception Breakpoint in Xcode

希望这会有所帮助!