Objective-c写冒泡排序

做面试题遇到用obj-c写冒泡排序,随便写了个

- (NSMutableArray *)sorted:(NSMutableArray *)array

{

int len = [array count];

for (int j = 0 ; j < len-1; j++) {

for (int i = 0; i < len-1-j; i++) {

if ([[array objectAtIndex:i] compare:[array objectAtIndex:i+1]] > 0) {

NSObject *temp = [array objectAtIndex:i];

[array replaceObjectAtIndex:i withObject:[array objectAtIndex:i+1]];

[array replaceObjectAtIndex:i+1 withObject:temp];

}

}

}

return array;

}

这是从小到大,从大到小的话直接这样调

NSMutableArray *arr = [NSMutableArray arrayWithObjects:@"3",@"5",@"1",@"2", nil];

NSMutableArray *sortedArr = [self sorted:arr];

NSArray *reverseArr = [[sortedArr reverseObjectEnumerator] allObjects];

NSLog(@"%@",reverseArr);