我正在使用 NSInvocation 如下:
在我的初始化中,我在 viewDidLoad 中写了这个:
SEL mySelector;
mySelector = @selector(initParsersetId:type:);
NSMethodSignature * sig = nil;
sig = [[self class] instanceMethodSignatureForSelector:mySelector];
myInvocation = nil;
myInvocation = [NSInvocation invocationWithMethodSignature:sig];
[myInvocation setTarget:self];
[myInvocation setSelector:mySelector];
我这样称呼它:
Idea *tempIdea = [[Idea alloc]init];
tempIdea = [genericArray objectAtIndex:indexPath.row];
idea.ideaId = tempIdea.ideaId;
[tempIdea release];
NSNumber *_id_ = [NSNumber numberWithInt:idea.ideaId];
[myInvocation setArgument:_id_ atIndex:2]; //CRASHING AT THIS LINE
我的应用程序在指示的行崩溃。有人可以帮我吗?