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有没有办法改变NSNumber中包含的值,而不是使它指向不同的NSNumber?改变一个NSNumber的值
NSNumber *num = [NSNumber numberWithInt:0]; num = [NSNumber numberWithInt: 1]; // now num points to a different object, which I don't want. I want it the same object still, but different value.
这是有点奇怪,没有NSMutableNumber – 2009-07-02 02:54:20