[animation setAutoreverses:NO];
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
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[animation setAutoreverses:NO];
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
转载于:https://www.cnblogs.com/zengyanzhi/p/3952064.html