当函数使用 getter 时 Objective C 中的 EXC_BAD_EXCESS

Question

- (NSDictionary *)myPropertyList   //Calling getter of myPropertyList
{
    if(!_myPropertyList){
        NSArray *colorsUsed = [[NSArray alloc] initWithObjects:[UIColor redColor], [UIColor blueColor], nil];
        _myPropertyList=[[NSDictionary alloc] initWithObjectsAndKeys: colorsUsed, @"colorUsed",[NSNumber numberWithDouble:MAX_RADIUS],@"maximumRadius",[NSNumber numberWithDouble:MIN_RADIUS],@"minimumRadius", [NSNumber numberWithInt:20],@"circleNumbers", nil];;
    }
    return _myPropertyList;
}

- (NSArray *)generateCircleList
{
    int minRadius=[[self.myPropertyList objectForKey:@"minimumRadius"] intValue];
    int maxRadius=[[self.myPropertyList objectForKey:@"maximumRadius"] intValue];
    ...
    //code continues

我的模型中有这段代码。当调用使用 myPropertyList 的函数generateCircleLlist 时，它会因 EXC_BAD_ACCESS 错误而崩溃。我确实环顾四周，但找不到解决方案。有什么帮助吗？

Answer 1

您正在创建 colorUsed 但使用 colorUsed，还要添加 [colorsUsed release]；用于内存管理。

if(!_myPropertyList){

    NSArray *colorsUsed = [[NSArray alloc] initWithObjects:[UIColor redColor], [UIColor blueColor], nil];
    _myPropertyList=[[NSDictionary alloc] initWithObjectsAndKeys: colorsUsed, @"colorUsed",[NSNumber numberWithDouble:MAX_RADIUS],@"maximumRadius",[NSNumber numberWithDouble:MIN_RADIUS],@"minimumRadius", [NSNumber numberWithInt:20],@"circleNumbers", nil];

    [colorsUsed release];
}