ios - 如何分离NSMutablearray中存在的元素

Question

我有一个带有NSMutablearray的应用程序，显示如下，我想要另一个数组，它包含一个接一个的所有城市，并且没有城市。到目前为止，索引1处的对象显示:

 2014-02-07 18:41:15.567 [313:a0b] cities Array (
                                            "Bangalore",
                                            "Chennai",
                                            "Delhi",
                                            "Mumbai"
                                            )

我希望将其分隔为:

Bangalore
Chennai
Delhi
Mumbai
Pune with out NO CITY


2014-02-07 18:41:15.567 [313:a0b] cities Array  NO CITY
2014-02-07 18:41:15.567 [313:a0b] cities Array (
"Bangalore",
"Chennai",
"Delhi",
"Mumbai"
)
2014-02-07 18:41:15.567 [313:a0b] functionalities Array NO CITY
2014-02-07 18:41:15.568 [313:a0b] functionalities Array Pune

Answer 1

请找到解决方案:

    NSMutableArray *arr = [[NSMutableArray alloc] initWithObjects:@"Bangalore",@"Chennai", @"Delhi", @"Pune", nil];
    NSLog(@"%@", [arr description]);

    NSMutableArray *arr1 = [[NSMutableArray alloc] init];

    for (NSString *str in arr) {
        if (![str isEqualToString:@"Pune"]) {
            [arr1 insertObject:str atIndex:arr1.count];
        }
    }
    NSLog(@"%@", [arr1 description]);

如果要在同一数组中执行操作，请使用以下代码:

    NSMutableArray *arr = [[NSMutableArray alloc] init];
    [arr addObject:@"Banagalore"];
    [arr addObject:@"Delhi"];
    [arr addObject:@"Mumbai"];
    [arr addObject:@"Pune"];

    NSLog(@"%@", [arr description]);

    for (int i = 0; i <[arr count] ; i++ )
    {
        if ([[arr objectAtIndex:i] isEqualToString:@"Pune"]) {
            [arr removeObjectAtIndex:i];
        }
    }
    NSLog(@"%@", [arr description]);