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通过下面的代码，又可以将NSValue转换成CGRect，CGPoint等类型的数值。
CGRect imageRect = [[self.lockImageRectArray objectAtIndex:l] CGRectValue];
通过NSValue就可以实现CGxxx类型的数值存储在NSMutable,NSDictionary类型的数组中。
@interface NSValue (NSValueUIGeometryExtensions)+ (NSValue *)valueWithCGPoint:(CGPoint)point;+ (NSValue *)valueWithCGSize:(CGSize)size;+ (NSValue *)valueWithCGRect:(CGRect)rect;+ (NSValue *)valueWithCGAffineTransform:(CGAffineTransform)transform;+ (NSValue *)valueWithUIEdgeInsets:(UIEdgeInsets)insets;+ (NSValue *)valueWithUIOffset:(UIOffset)insets __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0);- (CGPoint)CGPointValue;- (CGSize)CGSizeValue;- (CGRect)CGRectValue;- (CGAffineTransform)CGAffineTransformValue;- (UIEdgeInsets)UIEdgeInsetsValue;- (UIOffset)UIOffsetValue __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0);@end
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"lockButton.png"]];imageView.frame = CGRectMake(10 * (l + 1) + imageView.frame.size.width * l, 120 + 50 * r, imageView.frame.size.width, imageView.frame.size.height);[self.lockImageRectArray addObject:[NSValue valueWithCGRect:imageView.frame]];[self addSubview:imageView];标签：
原文地址：http://www.cnblogs.com/wcLT/p/4707239.html
