如何从NSThread调用一个方法?
我可以调用以下方法:
[regionsMapView addAnnotation:addAnnotation];
我如何在NSThread中调用它? 我用过如下:
[NSThread detachNewThreadSelector:@selector(addAnnotation)
toTarget:regionsMapView
withObject:addAnnotation];
但是应用程序崩溃了,如下所示:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSThread initWithTarget:selector:object:]: target does not implement selector (*** -[MKMapView addAnnotation])'
*** Call stack at first throw:
(
0 CoreFoundation 0x0182b5a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0197f313 objc_exception_throw + 44
2 CoreFoundation 0x017e3ef8 +[NSException raise:format:arguments:] + 136
3 CoreFoundation 0x017e3e6a +[NSException raise:format:] + 58
4 Foundation 0x0006c392 -[NSThread initWithTarget:selector:object:] + 146
5 Foundation 0x0006c2d3 +[NSThread detachNewThreadSelector:toTarget:withObject:] + 98
6 MJA 0x00008a8e -[TaetPaViewController showAddress:withItem:] + 389
7 MJA 0x00008eb9 -[TaetPaViewController UpdateInfo] + 784
8 MJA 0x0000835a -[TaetPaViewController parseTheLocalXml] + 408
9 Foundation 0x0006ccf4 -[NSThread main] + 81
10 Foundation 0x0006cc80 __NSThread__main__ + 1387
11 libSystem.B.dylib 0x911a47fd _pthread_start + 345
12 libSystem.B.dylib 0x911a4682 thread_start + 34
)
terminate called after throwing an instance of 'NSException'
Program received signal: “SIGABRT”.
答案 0 :(得分:3)
你最后忘记了结肠。
@selector(addAnnotation)
不是
@selector(addAnnotation:)
第一个调用不带参数的方法,第二个调用一个参数。 你的代码应该是这个
[NSThread detachNewThreadSelector:@selector(addAnnotation:)
toTarget:regionsMapView
withObject:addAnnotation];