将NSValue转换回CGPoint

Question

我做了一个像这样的NSMutableArray，存储了一堆CGPoint

    safeZonePoints = [NSMutableArray array];
    [safeZonePoints addObject:[NSValue valueWithCGPoint:CGPointMake(234, 160)]];
    [safeZonePoints addObject:[NSValue valueWithCGPoint:CGPointMake(284, 210)]];
    [safeZonePoints addObject:[NSValue valueWithCGPoint:CGPointMake(334, 160)]];
    [safeZonePoints addObject:[NSValue valueWithCGPoint:CGPointMake(284, 10)]];
    [safeZonePoints addObject:[NSValue valueWithCGPoint:CGPointMake(234, 160)]];

现在我可以从数组中获取NSValue，但是如何将NSValue转换回CGPoint

Answer 1

做这样的事：

NSValue *cgpointObj = [NSValue valueWithCGPoint:CGPointMake(234, 160)];
CGPoint loc = cgpointObj.pointValue;

请查看以下链接：CGPoint to NSValue and reverse

回答你的问题就足够了。