ios - 从xcode中的同一类调用方法

Question

我想调用方法“shows()”，但是为什么我得到“期望的标识符或(和使用未声明的标识符自身”的错误信息

ViewController.m

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    NSDictionary *inventory;
}
- (void)shows;
@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
inventory = @{@"Rahul":[NSNumber numberWithInt:11],
              @"iOS":[NSNumber numberWithInt:22]};
// Do any additional setup after loading the view, typically from a nib.
}

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

  - (void)shows
    {
      NSLog(@"%@",inventory);
    }


     [self shows];
@end

Answer 1

您不能在类范围内调用[view shows];，需要在一种方法中调用它，例如viewDidLoad这样称呼它:

- (void)viewDidLoad {
      [super viewDidLoad];
      inventory = @{@"Rahul":[NSNumber numberWithInt:11],
          @"iOS":[NSNumber numberWithInt:22]};
      // Do any additional setup after loading the view, typically from a nib.
      [self shows];//SHOWS call moved here...

}