Question

我有这个NSMutableArray

sections = [[NSMutableArray alloc] init];
[sections addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Electricity",@"Type",@"0",@"Count", nil]];
    [sections addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Water",@"Type",@"0",@"Count", nil]];
    [sections addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Mobile",@"Type",@"0",@"Count", nil]];
    [sections addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Internet",@"Type",@"0",@"Count", nil]];
    [sections addObject:[[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Fixed Line",@"Type",@"0",@"Count", nil]];

并且假设用户选择将水数从0更改为10怎么做？

Answer 1

[[sections objectAtIndex:1] setObject:@"10" forKey:@"Count"];

还有一件事。使用alloc + init创建对象时，应自行释放它们。因此，对于每个NSMutableDictionary，您的内存泄漏（在您的代码中）使用[[[NSMutableDictionary alloc] initWithObjectsAndKeys:..., nil] autorelease];或[NSMutableDictionary dictionaryWithObjectsAndKeys:..., nil];（当然，您可以稍后制作类似for (NSMutableDictionary *dict in sections) [dict release];的内容，但这看起来很难看。）

如何编辑NSMutableArray数据？

1 个答案: