objective-c - 如何将字典数据添加到数组中？

Question

我制作了一个数组和一个字典。现在我想将字典的值放入数组中。我对目标 C 很陌生，所以请帮忙。“视图控制器.m”

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];

marray = [[NSMutableArray alloc]initWithObjects:@"1",@"2",@"3",@"4", nil];
marray = [[NSMutableArray alloc]initWithObjects:@"6",@"7",@"8",@"9",@"10", nil];
[self displayarray];
[marray release];
mDictionary = [[NSMutableDictionary alloc]init];
[mDictionary setValue:@"sdfsdhfg" forKey:@"firstname"];
[mDictionary setValue:@"kvxv" forKey:@"lastname"];
[self displaydict];
[mDictionary release];
}
-(void)displaydict{
CFShow(mDictionary);
}
-(void)displayarray{
for (int i = 0; i<[marray count]; i++) {
    NSLog(@"the array data present at %d index is %@",i,[marray objectAtIndex:i]);
}
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}


@end

Answer 1

您的问题包含许多其他问题，我将尝试解决其中一些与将字典转换为数组相关的问题。

1. 存储所有密钥

   NSArray *dictKeys=[dict allKeys];
   

2. 存储所有值

   NSArray *dictValues=[dict allValues];
   

3. 如果要存储键和值：

   NSArray *keysAndValues=[dictKeys arrayByAddingObjectsFromArray:dictValues];
   

---

编辑：

由于您需要 NSMutableArray，您可以使用：

NSMutableArray *dictAllKeys=[NSMutableArray arrayWithArray:[dict allKeys]];
NSMutableArray *dictAllValues=[NSMutableArray arrayWithArray:[dict allValues]];
NSMutableArray *keysAndValues=[NSMutableArray arrayWithArray:[dictAllKeys arrayByAddingObjectsFromArray:dictAllValues]];

Answer 2

for (NSDictionary *dictionary in arrayname)
{
    NSMutableArray *array = [dictionary objectForKey:@"writeKey"];
}

这可能会帮助你

Answer 3

如果要访问 Dictionary 的值，请对值使用特定的键。为此，请使用以下格式。

NSArray *yourarray=[YourDictionary ObjectForKey:@"KEY"];

我希望这能帮到您。