NSArray *arr = @[@"9", @"-8", @"0", @"5"];
//arr = [arr sortedArrayUsingSelector:@selector(compare:)];//升序
arr = [arr sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
return -[obj1 compare:obj2];
}];//降序
NSLog(@"%@", arr);
转载于:https://www.cnblogs.com/shuangmuyu-S15/p/3542321.html
