超简单的筛选方法
array为你筛选的数组
NSNumber * max = [Array valueForKeyPath:@"@max.floatValue"];
NSNumber
* max = [Array valueForKeyPath:@
"@max.floatValue"
];
NSNumber * max = [Array valueForKeyPath:@"@min.floatValue"];ok结束
"@min.floatValue"