Objective c 从NSDictionary对象计算货币

其基本思想是遍历一个目录，该目录中包含包含货币值的NSDictionary对象的.plists

问题: 我如何遍历所有目录内容，提取所有“

当前值”

”对象，并将它们相加以获得总数？

例子 电流输出 期望输出 解决方案 溶液输出

---

你就不能保持一个连续的总数，还是我错过了

NSArray * itemList = [MANAGER contentsOfDirectoryAtPath:[NSString stringWithFormat:@"%@",INVENTORY_PATH] error:nil];

float total = 0.0f ;
for ( NSString * item in itemList )
{
    NSDictionary * currentItem = [NSDictionary dictionaryWithContentsOfFile:[NSString stringWithFormat:@"%@/%@",INVENTORY_PATH, item]];

    float monetaries = [[currentItem objectForKey:@"Current Value"] floatValue];
    total += monetaries ;
//    NSLog(@"Current Value: %.2f",monetaries);       
} 

NSLog(@"Total Value: %.2f",monetaries);       

---

另外，我认为使用

-stringByAddingPathComponent:

2012-05-06 22:11:33.583 WrightsCS[3151:15803] Current Value: 350.99
2012-05-06 22:11:33.584 WrightsCS[3151:15803] Current Value: 321.54

2012-05-06 22:11:33.584 WrightsCS[3151:15803] Total Value: 672.53

float total = 0.0f ;
float monetaries = 0.0f;

NSArray * itemList = [MANAGER contentsOfDirectoryAtPath:[NSString stringWithFormat:@"%@",INVENTORY_PATH] error:nil];
for ( NSString * item in itemList )
{
    NSDictionary * currentItem = [NSDictionary dictionaryWithContentsOfFile:[NSString stringWithFormat:@"%@/%@",INVENTORY_PATH, item]];

    monetaries = [[currentItem objectForKey:@"Current Value"] floatValue];
    total += monetaries ;     

    NSLog(@"Current Value: %.2f",monetaries);  
}    

NSLog(@"Total Value: %.2f",total);  

2012-05-06 22:26:05.460 WrightsCS[3205:15803] Current Value: 350.99
2012-05-06 22:26:05.462 WrightsCS[3205:15803] Current Value: 321.54
2012-05-06 22:26:05.462 WrightsCS[3205:15803] Total Value: 672.53

NSArray * itemList = [MANAGER contentsOfDirectoryAtPath:[NSString stringWithFormat:@"%@",INVENTORY_PATH] error:nil];

float total = 0.0f ;
for ( NSString * item in itemList )
{
    NSDictionary * currentItem = [NSDictionary dictionaryWithContentsOfFile:[NSString stringWithFormat:@"%@/%@",INVENTORY_PATH, item]];

    float monetaries = [[currentItem objectForKey:@"Current Value"] floatValue];
    total += monetaries ;
//    NSLog(@"Current Value: %.2f",monetaries);       
} 

NSLog(@"Total Value: %.2f",monetaries);