Question

我用Swift编写了99％的文章，不明白为什么这个线程崩溃了。我无法复制它，但有时会发生。

该库为：LTSupportAutomotive https://github.com/mickeyl/LTSupportAutomotive

错误：（从HockeyApp Crash Reporter中获取）在当前参数寄存器委托

中找到的选择器名称

异常类型：SIGSEGV

异常代码：SEGV_ACCERR位于0xac7c95df0

mapboxgl.accessToken = 'pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4M29iazA2Z2gycXA4N2pmbDZmangifQ.-g_vE53SD2WrJ6tFX7QHmA';

class Application extends React.Component {
    componentDidMount() {
        const map = new mapboxgl.Map({
            container: 'map', // container id
            style: 'mapbox://styles/mapbox/light-v9', // stylesheet location
            center: [13.392, 52.523], // starting position [lng, lat]
            zoom: 9 // starting zoom
        });
        map.addControl(new mapboxgl.NavigationControl());
        map.resize(); // tried with this to see if it would help
    }

    render() {
        return (
            <div className="row no-gutters">
                <div className="col-9">
                    <div className="map-wrapper">
                        <div ref={el => this.mapContainer = el} id="map"/>
                    </div>
                </div>
                <div className="col-3">
                    2 of 2
                </div>
            </div>
        )
    }
}

ReactDOM.render(<Application/>, document.getElementById('app'));

崩溃代码

Thread 6 Crashed:
0   libobjc.A.dylib                      0x00000001fe175430 objc_retain + 16
1   LTSupportAutomotive                  0x00000001065816f8 -[LTBTLEReadCharacteristicStream characteristicDidUpdateValue] (LTBTLEReadCharacteristicStream.m:43)
2   LTSupportAutomotive                  0x0000000106582ac8 -[LTBTLESerialTransporter peripheral:didUpdateValueForCharacteristic:error:] (LTBTLESerialTransporter.m:299)
3   CoreBluetooth                        0x0000000204b42cc0 -[CBPeripheral handleAttributeEvent:args:attributeSelector:delegateSelector:delegateFlag:] + 236
4   CoreBluetooth                        0x0000000204b42e20 -[CBPeripheral handleCharacteristicEvent:characteristicSelector:delegateSelector:delegateFlag:] + 128
5   CoreBluetooth                        0x0000000204b3e4d0 -[CBPeripheral handleMsg:args:] + 352
6   CoreBluetooth                        0x0000000204b38bdc -[CBCentralManager handleMsg:args:] + 200
7   CoreBluetooth                        0x0000000204b47750 __30-[CBXpcConnection _handleMsg:]_block_invoke + 56
8   libdispatch.dylib                    0x00000001fe9c56c8 _dispatch_call_block_and_release + 20
9   libdispatch.dylib                    0x00000001fe9c6484 _dispatch_client_callout + 12
10  libdispatch.dylib                    0x00000001fe96dbd0 _dispatch_lane_serial_drain$VARIANT$mp + 588
11  libdispatch.dylib                    0x00000001fe96e74c _dispatch_lane_invoke$VARIANT$mp + 480
12  libdispatch.dylib                    0x00000001fe96da9c _dispatch_lane_serial_drain$VARIANT$mp + 280
13  libdispatch.dylib                    0x00000001fe96e718 _dispatch_lane_invoke$VARIANT$mp + 428
14  libdispatch.dylib                    0x00000001fe976eb8 _dispatch_workloop_worker_thread + 596
15  libsystem_pthread.dylib              0x00000001feba90dc _pthread_wqthread + 308
16  libsystem_pthread.dylib              0x00000001febabcec start_wqthread + 0

从这里开始：

-(void)characteristicDidUpdateValue
{
    NSData* value = _characteristic.value;
    [_buffer appendData:value];
    [self.delegate stream:self handleEvent:NSStreamEventHasBytesAvailable]; <--- here it is crashing
}

有人可以帮助我使用Objective-C以避免崩溃吗？

谢谢

Answer 1

委托的声明是unsafe_unretained，而不是弱声明。

LTSupportAutomotive：在当前参数寄存器中找到的选择器名称：委托异常类型：SIGSEGV异常代码：SEGV_ACCERR at 0xac7c95df0

1 个答案: