objective C OSX - 委托无法识别的选择器发送到实例

时间:2013-03-09 19:53:14

标签: ios objective-c

changeView_ShowContact方法将使视图控制器显示得很好。但是当我从另一个类调用changeView_ShowContact时它不会工作。我在日志中收到错误“无法识别的选择器发送到实例”。

@protocol callingActions_fromMainNavigation <NSObject>
    - (IBAction)changeView_ShowContact:(id)sender;
@end

**@interface Navigation_Main : NSViewController**
@property (nonatomic, strong) id <callingActions_fromMainNavigation> delegate;

**@implementation Navigation_Main** 
@synthesize delegate;

- (IBAction)changeView_ShowContact:(id)sender;
{
    NSLog(@"********************ShowContact");
    AddStuffViewController = [[pageContact alloc] initWithNibName:@"pageContact" bundle:nil];
    [AddStuffView addSubview:[AddStuffViewController view]]; //<This call here works ok.
}

@interface contacts : NSObject <callingActions_fromMainNavigation>

**@implementation contacts**
-(void)myMethodCall:(id)sender;
{
    Navigation_Main *NavMain = [[Navigation_Main alloc] initWithNibName:@"Navigation_Main.h" bundle:nil];
    [NavMain setDelegate:self];
    [self changeView_ShowContact:nil];
    //I need to call the (IBAction)changeView_ShowContact in the Main Navigation. This 
    //code is not working.
}

1 个答案:

答案 0 :(得分:1)

您似乎已contacts采用callingActions_fromMainNavigation协议而未在changeView_ShowContact:班级中实施contacts