@synchronized 互斥锁

#import "ResourceSharing.h"

@interface ResourceSharing ()

@PRoperty(assign,nonatomic) int tickets;

@property(strong,nonatomic) NSString *str;

@end

@implementation ResourceSharing

- (void)viewDidLoad { [super viewDidLoad];

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

}

-(void)saleTickets{ while (YES) {

}