前段时间写工厂测试程序，遇到个小问题，就是在发测试命令时，由于回调函数是个block，而block是异步处理的。导致结果无法及时返回。
查看资料后，我是这么处理的
#define TestNeedsToWaitForBlock() __block BOOL blockFinished = NO #define BlockFinished() blockFinished = YES #define WaitForBlock() while (CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true) && !blockFinished)
- (void)setAndGetStepGoal:(int)goal {
NSLog(@"测试设置运动目标值:%d", goal);
{
TestNeedsToWaitForBlock();
[CommandInterface setSteps:goal completion: ^(BOOL success, NSDictionary *info) {
BlockFinished();
}];
WaitForBlock();
}
{
TestNeedsToWaitForBlock();
[CommandInterface getGoal: ^(BOOL success, NSDictionary *info) {
int deviceGoal = [info[@"steps"] intValue];
NSLog(@"设置运动目标值结果:%d>>>>>>%d", goal, deviceGoal);
XCTAssertEqual(goal, deviceGoal, @"goal与期望不符");
BlockFinished();
}];
WaitForBlock();
}
}
原理其实很简单，使用 CFRunLoopRunInMode，阻止线程退出，等待系统消息。
原文：http://www.cnblogs.com/kw-ios/p/4040943.html