NSArray * newArr = [_userModels sortedArrayUsingComparator:(NSComparator)^(id obj1, id obj2) {
return (arc4random() % 3) - 1;
}];
[_userModels removeAllObjects];
[_userModels addObjectsFromArray:newArr];
NSArray * newArr = [_userModels sortedArrayUsingComparator:(NSComparator)^(id obj1, id obj2) {
return (arc4random() % 3) - 1;
}];
[_userModels removeAllObjects];
[_userModels addObjectsFromArray:newArr];