韩万杰的博客

#import "GCD.h"@interface GCD ()@property (strong,nonatomic) UIImageView * backImage;@end@implementation GCD- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController (void)viewDidLoad { [super viewDidLoad];//全局队列 dispatch_queue_t q = dispatch_get_global_queue(0, 0);//并发队列 di

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController (void)viewDidLoad { [super viewDidLoad];//全局队列 dispatch_queue_t q = dispatch_get_global_queue(0, 0);//并发队列 di