如何根據特定參數對對象數組進行排序

Question

我有一個類，它具有不同的屬性，如地名，地點距離，用戶名，我將這個類對象存儲在數組中。我想根據距離。我可以做什麼。請用一些代碼建議。

Answer 1

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"placeDistance" ascending:TRUE]; 
[your array sortUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]] 

Answer 2

NSArray* array... 
NSArray* sorted_array = [array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) { 
    YourClass* a = (YourClass*)obj1; 
    YourClass* b = (YourClass*)obj2; 
    /* 
    return NSComparisonResult based on a property comparison here, 
    for example, return [a.distance compare:b.distance] if distance is an NSNumber 
    */ 
}]; 

就像Sort ignoring punctuation (Objective-C)