iOS 冒泡排序

//冒泡排序

-(NSArray*)Bubble_Sort:(NSArray*)oldArray

{

NSMutableArray * newArray = [NSMutableArray arrayWithArray: oldArray];

NSInteger num = [oldArray count];

for(int i = 0 ; i < num-1 ; i++)

{

for(int j = i +1; j < num ; j++)

{

int num1 = [[oldArray objectAtIndex: i] time];

int num2 = [[oldArray objectAtIndex: j] time];

if(num1 < num2)

{

//                [newArray replaceObjectAtIndex: i  withObject:[oldArray objectAtIndex: j]];

//                [newArray replaceObjectAtIndex: j  withObject:[oldArray objectAtIndex: i]];

[newArray exchangeObjectAtIndex:i withObjectAtIndex:j];

}

}

}

return newArray;

}