使用sortedArrayUsingFunction排序NSArray

Question

任何使用sortedArrayUsingFunction排序NSArray的好例子？

TY！

Answer 1

NSArray *sorted_bookings = [myUnsortedArray sortedArrayUsingFunction:Sort_Bookingdate_Comparer context:self]; 

NSInteger Sort_Bookingdate_Comparer(id id1, id id2, void *context) 
{ 
    // Sort Function 
    Booking* booking1 = (Booking*)id1; 
    Booking* booking2 = (Booking*)id2; 


    return ([booking1.BOOKING_DATE compare:booking2.BOOKING_DATE]); 
} 

這我用來通過bookingdate預訂排序。 Booking是一個包含名爲BOOKING_DATE的綜合實例變量的類。

Answer 2

如文檔中所述： 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) 
     return NSOrderedAscending; 
    else if (v1 > v2) 
     return NSOrderedDescending; 
    else 
     return NSOrderedSame; 
} 

Answer 3

使用的NSMutableArray關閉類似物：

[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; 
}