NSMutableArray的双条件或多条件排序

最近我在研究双条件或多条件排序，当然是有主要条件和次要条件的咯。假设有这么个场景：需要对优惠卷进行双重条件排序,根据优惠卷状态和优惠卷的消费金额进行正序排序,所用代码如下:

先按照优惠卷状态排序，状态一样再按优惠卷消费金额排序.

初级方法:

- (void)sortArr {

NSMutableArray *customArr = [[NSMutableArrayalloc]
init];

for (NSInteger i =0 ; i <
100; i ++) {

CustomMode *mode = [[CustomModealloc]
init];

mode.customName = [NSStringstringWithFormat:@"客户%ld",(long)i];

mode.couponCode = [selfarcdomStr];

mode.couponPrice =
arc4random()%8888 +
1;

mode.consumeStatus =arc4random()%ConsumeStatus_noRejected;

[customArr addObject:mode];

}

NSArray *sortArr = [customArr
sortedArrayUsingComparator:^NSComparisonResult(id _Nonnull obj1,
id _Nonnull obj2) {

CustomMode *mode1 = (CustomMode *)obj1;

CustomMode *mode2 = (CustomMode *)obj2;

[@(mode1.consumeStatus)compare:@(mode2.consumeStatus)];

if (mode1.consumeStatus > mode2.consumeStatus) {

returnNSOrderedDescending;

} else if (mode1.consumeStatus == mode2.consumeStatus) {

return (mode1.couponPrice > mode2.couponPrice);

} else if (mode1.consumeStatus < mode2.consumeStatus) {

returnNSOrderedAscending;

}

return NSOrderedSame;

}];

for (CustomMode *modein sortArr) {

NSLog(@"consumeStatus is %d couponPrice is %f\n\n",mode.consumeStatus,mode.couponPrice);

}

}

高级方法:

- (void)sortArr1 {

NSMutableArray *customArr = [[NSMutableArray
alloc]
init];

for (NSInteger i =
0 ; i < 100; i ++) {

CustomMode *mode = [[CustomMode
alloc] init];

mode.customName = [NSString
stringWithFormat:@"客户%ld",(long)i];

mode.couponCode = [self
arcdomStr];

mode.couponPrice =
arc4random()%8888 +
1;

mode.consumeStatus =
arc4random()%ConsumeStatus_noRejected;

[customArr addObject:mode];

}

NSDate *date = [NSDate
date];

// 1.先按照书名进行排序

//
这里的key写的是@property的名称

NSSortDescriptor *statusDesc = [NSSortDescriptor
sortDescriptorWithKey:@"consumeStatus"
ascending:YES];

// 2.再按照姓进行排序

NSSortDescriptor *priceDesc = [NSSortDescriptor
sortDescriptorWithKey:@"couponPrice"
ascending:YES];

// 按顺序添加排序描述器

NSArray *descs = [NSArray
arrayWithObjects:statusDesc, priceDesc,
nil];

NSArray *array2 = [customArr
sortedArrayUsingDescriptors:descs];

// for (CustomMode *mode in array2) {

// NSLog(@"\nconsumeStatus is %d couponPrice is %f\n\n",mode.consumeStatus,mode.couponPrice);

// }

NSLog(@"tmv2 is %f",[[NSDate
date] timeIntervalSinceDate:date]);

}

代码github地址:https://github.com/songxuhua/TestForAlgorithms