用 NSMutableArray 記錄與取得 int ，CGPoint

Objective-C 真是一個麻煩的語言

//int 記錄與取得

myArray = [NSMutableArray array];
[myArray addObject:[NSNumber numberWithInteger:1234]];
//..
int theNumber = [[myArray objectAtIndex:0] integerValue];

//CGPoint記錄與取得
NSArray *points = [NSArray arrayWithObjects:
  [NSValue valueWithCGPoint:CGPointMake(5.5, 6.6)],
  [NSValue valueWithCGPoint:CGPointMake(7.7, 8.8)], nil];
NSValue *val = [points objectAtIndex:0];
CGPoint p = [val CGPointValue];