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  • NSOperationQueue的maxConcurrentOperationCount属性

    代码:

    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    queue.maxConcurrentOperationCount = 2;
    
    for (NSUInteger i = 1; i <= 10;  ++i) {
        [queue addOperationWithBlock:^{
            NSLog(@"Block %lu", i);
            [NSThread sleepForTimeInterval:1];
        }];
    }

    输出:

    2016-11-03 22:20:37.508 maxConcurrentOperationCount[1196:26292] Block 1
    2016-11-03 22:20:37.508 maxConcurrentOperationCount[1196:26295] Block 2
    2016-11-03 22:20:38.512 maxConcurrentOperationCount[1196:26290] Block 3
    2016-11-03 22:20:38.512 maxConcurrentOperationCount[1196:26295] Block 4
    2016-11-03 22:20:39.517 maxConcurrentOperationCount[1196:26292] Block 5
    2016-11-03 22:20:39.517 maxConcurrentOperationCount[1196:26290] Block 6
    2016-11-03 22:20:40.523 maxConcurrentOperationCount[1196:26290] Block 8
    2016-11-03 22:20:40.523 maxConcurrentOperationCount[1196:26295] Block 7
    2016-11-03 22:20:41.525 maxConcurrentOperationCount[1196:26290] Block 9
    2016-11-03 22:20:41.525 maxConcurrentOperationCount[1196:26292] Block 10

    备注:

    请注意每两行输出之间的时间间隔

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  • 原文地址:https://www.cnblogs.com/xwoder/p/6028522.html
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