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利用NSOperation 与 NSOperationQueue

2016-04-13  本文已影响113人  5c7a7cf606fc
NSOperationQueue * queue = [[NSOperationQueue alloc]init];
NSOperation * A = [NSBlockOperation blockOperationWithBlock:^{
    NSLog{@"A"};
}];
NSOperation * B = [NSBlockOperation blockOperationWithBlock:^{
    NSLog{@"B"};
}];
NSOperation * C = [NSBlockOperation blockOperationWithBlock:^{
    NSLog{@"C"};
}];
[C addDependency:a];
[C addDependency:b];
[queue addOperation:a];
[queue addOperation:b];
[queue addOperation:c];
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