获取NSArray中元素的和
NSNumber *sum = [countArray valueForKeyPath:@"@sum.floatValue"];
获取NSArray中元素的最大值
NSInteger max = [[countArray valueForKeyPath:@"@max.intValue"] integerValue];
NSNumber *sum = [countArray valueForKeyPath:@"@sum.floatValue"];
NSInteger max = [[countArray valueForKeyPath:@"@max.intValue"] integerValue];
本文标题:获取NSArray中元素的和/最大值
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