摘要：
//创建一个队列 NSOperationQueue *operation=[[NSOperationQueue alloc]init]; //把任务放在NSBlockOperation里面 NSBlockOperation *myOperation=[NSBlockOpe... 阅读全文
摘要：
#import @class TTOperation;@protocol TTOperationDelegate -(void)operationComplete:(NSData *)data;@end@interface TTOperation : NSOperation@property(non... 阅读全文
摘要：
//创建一个队列 NSOperationQueue *operation=[[NSOperationQueue alloc]init]; //把任务放在NSBlockOperation里面 NSBlockOperation *myOperation=[NSBlockOperati... 阅读全文
摘要：
#define KURL1 @"http://img0.imgtn.bdimg.com/it/u=79920747,2237302485&fm=90&gp=0.jpg"#define KURL2 @"http://img5.imgtn.bdimg.com/it/u=2983485216,136114... 阅读全文
摘要：
1：dispatch_get_global_queue 后台执行队列2：dispatch_get_main_queue 主队列3：dispatch_queue_create("test", DISPATCH_QUEUE_CONCURRENT) 自定义队列：其中第二个参数为DISPATCH_QUE... 阅读全文
摘要：
#import "ViewController.h"@interface ViewController ()@property (weak, nonatomic) IBOutlet UILabel *remindLabel;@end@implementation ViewController- (v... 阅读全文