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这里的新手,在可编程计算器上工作。属性x找不到对象类型y
在模型类CalculatorBrain
的界面,我宣布
@property (nonatomic, strong) NSMutableArray *whatHappenedSinceLastClear;
然后在执行我也声明
-(NSMutableArray *)whatHappenedSinceLastClear
{
if(!_whatHappenedSinceLastClear) _whatHappenedSinceLastClear = [[NSMutableArray alloc] init];
return _whatHappenedSinceLastClear;
}
然后
-(double)runProgram:(id)whatHappenedSinceLastClear
{
NSMutableArray *mutableCopyOfWhatHappenedSinceLastClear;
if ([program isKindOfClass:[NSArray class]]) {
mutableCopyOfWhatHappenedSinceLastClear = [whatHappenedSinceLastClear mutableCopy];
}
return [self popOffProgramStack:mutableCopyOfWhatHappenedSinceLastClear];
}
但在ViewController中,当我宣布
-(IBAction)testPressed:(id)sender
{
CalculatorBrain *brain = self.brain;
brain = [[CalculatorBrain alloc] init];
NSMutableArray *program = brain.whatHappenedSinceLastClear;
[brain runProgram:program];
}
在行NSMutableArray *program = brain.whatHappenedSinceLastClear;
我收到一条消息,说'属性'whatHappenedSinceLastClear'没有找到'CalculatorBrain *'类型的对象上。
我在做什么错?
Does http://stackoverflow.com/questions/10527653/property-x-not-found-on-object-of-type-y-error-only-with-arc help? – Vervious 2012-08-01 05:30:42
您是否在您的视图控制器实现中包含了CalculatorBrain.h? – 2012-08-01 05:31:22
唉,我确实在实现中包含了CalculatorBrain.h,我遵循了这些建议,但没有成功。 :(我将发布一个后续问题,包括我的大部分代码,希望我做了一些错误,而不是处理一个错误,因为在这一点上,当我还是很新的,不能分辨真的会妨碍我的学习能力。 – 2012-08-01 16:36:18