ios - 从 Objective-C 的 void 中获取值

Question

我想从我的 void 方法中获取 json 字符串，让我们看看

-(void) getIDfromMarket{}

我想显示来自 getIDfromMarket 的结果 json，它已经成功了，现在我想将它传递给

-(void)viewDidLoad

该怎么做？这是我的代码

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

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self getIDfromMarket];
     NSLog(@"ID==",ID);
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

//////get global market From JSOn
-(void) getIDfromMarket{
    NSError *error = nil;
    ///set params url to get market localization
    NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://someurl"]];
    if (jsonData) {
    id jsonObjects = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
    NSArray *Market = [jsonObjects objectForKey:@"market"];
        NSLog(@"%@", Market);
        if(Market==NULL){
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Oh Snap!" message:@"Can't Get Market ID " delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
            [alert show];

        }
    }
    else{

        NSLog(@"Error Fetch Market ID");
 }

}

@end

我想记录 NSLog(@"%@", Market); 而不是在 viewDidLoad 上，该怎么做？

Answer 1

-(NSArray *) getIDfromMarket{
    NSError *error = nil;
    ///set params url to get market localization
    NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://someurl"]];
    if (jsonData) {
        id jsonObjects = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
        NSArray *Market = [jsonObjects objectForKey:@"market"];
        NSLog(@"%@", Market);
        if(Market==nil){
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Oh Snap!" message:@"Can't Get Market ID " delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
            [alert show];
            return nil;
        } else {
            return Market;
        }
    }
    else{

        NSLog(@"Error Fetch Market ID");
        return nil;
 }

}