objective-c - 将 NSValue 转换回 CGPoint

Question

我做了一个NSMutableArray这样的存储一堆CGPoints

    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NSValue从数组中获取 s 了，但是如何将一个NSValueback转换为 sCGPoint呢？

Answer 1

做这样的事情：

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

查看以下链接：CGPoint to NSValue and reverse

回答你的问题应该足够了。