iOS小记－－NSArray 排序

数组内装有V3HealthModel，依靠model的startTime属性将数组重新排序

 一：

NSMutableArray *returnArray = [NSMutableArray array];

NSComparator cmptr = ^(id obj1, id obj2){

if ([((V3HealthModel *)obj1) startTime] < [((V3HealthModel *)obj2) startTime]) {

return (NSComparisonResult)NSOrderedDescending;

}

else

{

return (NSComparisonResult)NSOrderedAscending;

}

};

NSLog(@"%ld %ld",((V3HealthModel *)[healthArray firstObject]).startTime,((V3HealthModel *)[healthArray lastObject]).startTime);

[returnArray addObjectsFromArray:[healthArray sortedArrayUsingComparator:cmptr]];

二：

NSArray *sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"startTime" ascending:NO]];

[healthArray sortUsingDescriptors:sortDescriptors];