interfaceProperty Property of WKInterfaceController

InterfaceProperty.h

#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>

@interface InterfaceController : WKInterfaceController

@property (nonatomic) IBOutlet WKInterfaceLabel *textLabel;

@end

InterfaceProperty.m

#import "InterfaceController.h"

@implementation InterfaceController

- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];
    NSLog(@"%@", self.textLabel.interfaceProperty);
    // console output is "textLabel"
}

@end