ios 数组排序
2013-08-09 11:55
351 查看
第一种:利用数组的sortedArrayUsingComparator调用 NSComparator
示例:
obj1和obj2指的是数组中的对象
//1.数组中存放的是字符
NSComparator cmptr = ^(id obj1, id obj2){
if ([obj1 integerValue] > [obj2 integerValue]) {
return (NSComparisonResult)NSOrderedDescending;
}
if ([obj1 integerValue] < [obj2 integerValue]) {
return (NSComparisonResult)NSOrderedAscending;
}
return (NSComparisonResult)NSOrderedSame;
};
NSArray *sortArray = [[NSArray alloc] initWithObjects:@"1",@"3",@"4",@"7",@"8",@"2",@"6",@"5",@"13",@"15",@"12",@"20",@"28",@"",nil];
NSLog(@"排序前:%@",sortArray);
NSArray *array = [sortArray sortedArrayUsingComparator:cmptr];
NSLog(@"排序后:%@",array);
//2.数组中存放的是字典对象
NSComparator cmptr = ^(id obj1,id obj2) {
if ([[obj1 objectForKey:@"date_update"] intValue] > [[obj2 objectForKey:@"date_update"] intValue]) {
return (NSComparisonResult)NSOrderedDescending;
}
if ([[obj1 objectForKey:@"date_update"] intValue] < [[obj2 objectForKey:@"date_update"] intValue]) {
return (NSComparisonResult)NSOrderedAscending;
}
return (NSComparisonResult)NSOrderedSame;
};
favoritesArray为NSArray数组,内容为:(
{
"date_update" = 1374823501;
id = 2;
videolink = "http://v.youku.com/player/getRealM3U8/vid/XNTY5NzcxNTAw/type//video.m3u8";
},
{
"date_update" = 1375177741;
id = 1;
videolink = "http://v.youku.com/player/getRealM3U8/vid/XNTY5MjcwNDcy/type//video.m3u8";
},
{
"date_update" = 1374824546;
id = 3;
videolink = "http://v.youku.com/player/getRealM3U8/vid/XNTY5Njk0Mjg0/type//video.m3u8";
}
)
favoritesArray = [favoritesArray sortedArrayUsingComparator:cmptr];
NSLog(@"排序后 array ===%@",favoritesArray);
第二种排序方法:利用sortedArrayUsingFunction 调用对应方法customSort。
这个方法中的obj1和obj2分别是指数组中的对象。
NSInteger customSort(id obj1, id obj2, void *context)
{
if ([[obj1 objectForKey:@"date_update"] integerValue] > [[obj2 objectForKey:@"date_update"] integerValue]) {
return (NSComparisonResult)NSOrderedDescending;
}
if ([[obj1 objectForKey:@"date_update"] integerValue] < [[obj2 objectForKey:@"date_update"] integerValue]) {
return (NSComparisonResult)NSOrderedAscending;
}
return (NSComparisonResult)NSOrderedSame;
}
favoritesArray = [favoritesArray sortedArrayUsingFunction:customSort context:nil];
//
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html
This I used to sort bookings by bookingdate. Booking is a class with a synthesized instance variable called BOOKING_DATE.
//
第三种利用sortUsingDescriptors调用NSSortDescriptor
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"date_update" ascending:NO];
//其中,date_update为数组中的对象的属性,这个针对数组中存放对象比较更简洁方便.
//1.对数组中的字典对象排序
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"date_update" ascending:YES];
[favoritesArray sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];
NSLog(@"排序后 favoritesArray===%@",favoritesArray);
//2.可变数组
NSMutableArray *tempArray = [[NSMutableArray alloc]init];
for (int i=0; i<10; i++) {
NSString *str = [NSString stringWithFormat:@"%d",i];
NSMutableDictionary *httpHeaderDic = [[NSMutableDictionary alloc]initWithCapacity:2];
[httpHeaderDic setValue:str forKey:@"id"];
[tempArray addObject:httpHeaderDic];
}
NSLog(@"排序前 Array ==%@",tempArray);
NSSortDescriptor *sortDescriptor2 = [[NSSortDescriptor alloc] initWithKey:@"id" ascending:NO];
[tempArray sortUsingDescriptors:[NSArray arrayWithObject:sortDescriptor2]];
NSLog(@"排序后 Array ==%@",tempArray);
示例:
obj1和obj2指的是数组中的对象
//1.数组中存放的是字符
NSComparator cmptr = ^(id obj1, id obj2){
if ([obj1 integerValue] > [obj2 integerValue]) {
return (NSComparisonResult)NSOrderedDescending;
}
if ([obj1 integerValue] < [obj2 integerValue]) {
return (NSComparisonResult)NSOrderedAscending;
}
return (NSComparisonResult)NSOrderedSame;
};
NSArray *sortArray = [[NSArray alloc] initWithObjects:@"1",@"3",@"4",@"7",@"8",@"2",@"6",@"5",@"13",@"15",@"12",@"20",@"28",@"",nil];
NSLog(@"排序前:%@",sortArray);
NSArray *array = [sortArray sortedArrayUsingComparator:cmptr];
NSLog(@"排序后:%@",array);
//2.数组中存放的是字典对象
NSComparator cmptr = ^(id obj1,id obj2) {
if ([[obj1 objectForKey:@"date_update"] intValue] > [[obj2 objectForKey:@"date_update"] intValue]) {
return (NSComparisonResult)NSOrderedDescending;
}
if ([[obj1 objectForKey:@"date_update"] intValue] < [[obj2 objectForKey:@"date_update"] intValue]) {
return (NSComparisonResult)NSOrderedAscending;
}
return (NSComparisonResult)NSOrderedSame;
};
favoritesArray为NSArray数组,内容为:(
{
"date_update" = 1374823501;
id = 2;
videolink = "http://v.youku.com/player/getRealM3U8/vid/XNTY5NzcxNTAw/type//video.m3u8";
},
{
"date_update" = 1375177741;
id = 1;
videolink = "http://v.youku.com/player/getRealM3U8/vid/XNTY5MjcwNDcy/type//video.m3u8";
},
{
"date_update" = 1374824546;
id = 3;
videolink = "http://v.youku.com/player/getRealM3U8/vid/XNTY5Njk0Mjg0/type//video.m3u8";
}
)
favoritesArray = [favoritesArray sortedArrayUsingComparator:cmptr];
NSLog(@"排序后 array ===%@",favoritesArray);
第二种排序方法:利用sortedArrayUsingFunction 调用对应方法customSort。
这个方法中的obj1和obj2分别是指数组中的对象。
NSInteger customSort(id obj1, id obj2, void *context)
{
if ([[obj1 objectForKey:@"date_update"] integerValue] > [[obj2 objectForKey:@"date_update"] integerValue]) {
return (NSComparisonResult)NSOrderedDescending;
}
if ([[obj1 objectForKey:@"date_update"] integerValue] < [[obj2 objectForKey:@"date_update"] integerValue]) {
return (NSComparisonResult)NSOrderedAscending;
}
return (NSComparisonResult)NSOrderedSame;
}
favoritesArray = [favoritesArray sortedArrayUsingFunction:customSort context:nil];
//
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html
NSInteger intSort(id num1, id num2,void*context){ int v1 =[num1 intValue];int v2 =[num2 intValue]; if(v1 < v2)returnNSOrderedAscending; elseif(v1 > v2)returnNSOrderedDescending; elsereturnNSOrderedSame; }
NSArray*sorted_bookings =[myUnsortedArray sortedArrayUsingFunction:Sort_Bookingdate_Comparer context:self]; NSIntegerSort_Bookingdate_Comparer(id id1, id id2,void*context){
// Sort
FunctionBooking* booking1 =(Booking*)id1; Booking* booking2 =(Booking*)id2; return([booking1.BOOKING_DATE compare:booking2.BOOKING_DATE]); }
This I used to sort bookings by bookingdate. Booking is a class with a synthesized instance variable called BOOKING_DATE.
[opponentMatchDicts sortUsingFunction:compareMatchByDate context:nil]; static int compareMatchByDate( id m1, id m2,void*context){ NSDictionary*mDict1 =(NSDictionary*) m1; NSDictionary*mDict2 =(NSDictionary*) m2; NSDate*date1 =[mDict1 objectForKey:kMatchNSDate]; NSDate*date2 =[mDict2 objectForKey:kMatchNSDate]; int rv =[date1 compare:date2]; return rv; }
//
第三种利用sortUsingDescriptors调用NSSortDescriptor
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"date_update" ascending:NO];
//其中,date_update为数组中的对象的属性,这个针对数组中存放对象比较更简洁方便.
//1.对数组中的字典对象排序
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"date_update" ascending:YES];
[favoritesArray sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];
NSLog(@"排序后 favoritesArray===%@",favoritesArray);
//2.可变数组
NSMutableArray *tempArray = [[NSMutableArray alloc]init];
for (int i=0; i<10; i++) {
NSString *str = [NSString stringWithFormat:@"%d",i];
NSMutableDictionary *httpHeaderDic = [[NSMutableDictionary alloc]initWithCapacity:2];
[httpHeaderDic setValue:str forKey:@"id"];
[tempArray addObject:httpHeaderDic];
}
NSLog(@"排序前 Array ==%@",tempArray);
NSSortDescriptor *sortDescriptor2 = [[NSSortDescriptor alloc] initWithKey:@"id" ascending:NO];
[tempArray sortUsingDescriptors:[NSArray arrayWithObject:sortDescriptor2]];
NSLog(@"排序后 Array ==%@",tempArray);
相关文章推荐
- iOS开发数组去重方法,排序去重和包含元素
- iOS如何对包含date的数组进行排序
- iOS 数组排序
- IOS数组排序
- IOS几种简单有效的数组排序方法
- iOS入门(五)数组排序
- IOS几种简单有效的数组排序方法
- iOS--字典数组排序(每个数组里面都是一个model)NSSortDescriptor
- iOS 数组的排序(升序、降序、乱序)
- iOS开发数组去重方法,排序去重和包含元素
- 【Demo】IOS中将对象数组按照时间戳排序
- iOS 数组中的string 按照字典排序
- IOS数组按中文关键字以字母序排序
- ios中文数组排序
- iOS开发分分钟搞定C语言 —— 数组及排序
- iOS开发分分钟搞定C语言 —— 数组及排序
- iOS数组的去重,判空,删除元素,删除重复元素 model排序 等
- ios开发数组排序(数组中包括字典)
- IOS数组自动排序
- iOS开发数组去重方法,排序去重和包含元素