BTOperations

NSOperation高级用法

NSOperation基础

写了篇关于Operation基础的文章 👋 NSOperation 高级用法之NSOperation基础（NSOperation源码分析）（上）

BTGroupOperation使用

    NSBlockOperation *op1 = [NSBlockOperation blockOperationWithBlock:^{
        NSLog(@"op1");
    }];
    
    NSBlockOperation *op2 = [NSBlockOperation blockOperationWithBlock:^{
        NSLog(@"op2");
    }];
    [op2 addDependency:op1];
    
    BTGroupOperation *gop = [[BTGroupOperation alloc] initWithOperations:@[op1,op2]];
    
    NSBlockOperation *op3 = [NSBlockOperation blockOperationWithBlock:^{
        NSLog(@"op3");
    }];
    [op3 addDependency:op2];
    
    [[NSOperationQueue currentQueue] addOperation:gop];
    [[NSOperationQueue currentQueue] addOperation:op3];