iOS-根据字典key排序提取value

字典本身无序，我们有时候需要依据有序字典key提取value。

/**
 获取字典有序value数组
 对传入的字典key进行排序，依序提取value入数组

 @param dict NSDictionary
 @return NSArray 
 */
-(NSArray *) orderValueArrayWithDictionary:(NSDictionary *) dict {
    
    NSMutableArray *orderValueArray = [[NSMutableArray alloc]init];
    
    //取出字典所有key
    NSArray *keyArray = [dict allKeys];
    
    //将key排序
    NSArray *sortedArray = [keyArray sortedArrayUsingComparator:^NSComparisonResult(id obj1,id obj2) {
        return[obj1 compare:obj2 options:NSNumericSearch];//正序
    }];
    
    //根据key的顺序提取相应value
    for (NSString *key in sortedArray) {
        [orderValueArray addObject:[dict objectForKey:key]];
    }

    return orderValueArray;
}