Iphone 使用类对象按字母顺序为小对象排序NSMutableArray

我有一个包含属性类对象的数组，比如

for (int i=0; i<[eventList count]; i++) {

    NSDictionary *EventListDic=[eventList objectAtIndex:i];

    eventData.eventID=[EventListDic objectForKey:@"event_id"];
    eventData.eventsname=[EventListDic objectForKey:@"title"];

    [self.arrEventDataList addObject:eventData];
    [eventData release];

}

我想按事件名称对我的欠账清单进行排序。

试试这个

NSSortDescriptor *sortByName = [NSSortDescriptor sortDescriptorWithKey:@"eventsname"
                                                                 ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortByName];
NSArray *sortedArray = [arrEventDataList sortedArrayUsingDescriptors:sortDescriptors];

您将获得已排序的值。这将对你的

arreventdata列表进行排序

试试这个

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"self" ascending:YES];
NSArray *sortedFloats = [eventData.eventsname sortedArrayUsingDescriptors:
                    [NSArray arrayWithObject:sortDescriptor]];
[sortDescriptor release];

// Put the two arrays into a dictionary as keys and values
NSDictionary *dictID = [NSDictionary dictionaryWithObjects:eventData.eventID  forKeys:eventData.eventsname];

// Sort the second array based on the sorted first array
sortedID = [dictID objectsForKeys:sortedFloats notFoundMarker:[NSNull null]];

---

这与Xcode完全无关-如果你使用了另一个IDE，那也没什么区别。此外：“我用NSSortDescriptor试用过”-然后展示你试用过的代码。-“但它不起作用”-嗯，“它不起作用”是没有信息的，就好像你去看医生，在你告诉他“我感觉不舒服”后，就希望他能治好你的病一样。NSSortDescriptor*sortDescriptor=[[NSSortDescriptor alloc]initWithKey:eventData.eventsname升序：否]；NSArray*orderedArray=[listArray SortedArray使用描述符：[NSArray arrayWithObject:sortDescriptor]]；我使用了这个函数。@userXXX现在将它格式化并放入问题中，这样我就可以阅读它了。

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"self" ascending:YES];
NSArray *sortedFloats = [eventData.eventsname sortedArrayUsingDescriptors:
                    [NSArray arrayWithObject:sortDescriptor]];
[sortDescriptor release];

// Put the two arrays into a dictionary as keys and values
NSDictionary *dictID = [NSDictionary dictionaryWithObjects:eventData.eventID  forKeys:eventData.eventsname];

// Sort the second array based on the sorted first array
sortedID = [dictID objectsForKeys:sortedFloats notFoundMarker:[NSNull null]];