將對象陣列拆分爲4組 - ios

Question

如何將對象數組拆分爲對象數組數組？

說我想分成4組，我該怎麼做？

[A，B，C，d，E，F，G，H] => [A，B]並[c，d] [E，F] [G，H]

或也許如果我指定我想分成3組，那麼結果應該是 [a，b，c]，[d，e，f]，[g，h]

不存在。

Answer 1

試試這個。

NSMutableArray *splitted = [NSMutableArray array];  
id firstItem, secondItem; 
for (NSInteger i=0; i <= [originalArray count]-1; i+=2) { 
     @try { 
      firstItem = [originalArray objectAtIndex:i]; 
      secondItem = [originalArray objectAtIndex:i+1]; 
     } 
     @catch (NSException *exception) { 
      secondItem = [NSNull null]; 
     } 
     @finally { 
      [splitted addObject:@[firstItem,secondItem]]; 
     } 
} 

Answer 2

試試這個爲出發點：

NSArray *array = [NSArray arrayWithObjects:@"a", @"b", @"c", @"d", @"e", @"f", @"g", @"h", nil]; 
NSMutableArray *manyArrays = [NSMutableArray array]; 
int numberOfElementsInSubArrays = 2; 
int numberOfSubArrays = ceil((float)[array count]/(float)numberOfElementsInSubArrays); 
for (int i = 0; i < numberOfSubArrays; i++) { 
    NSMutableArray *subArray = [NSMutableArray array]; 
    for (int j = 0; j < numberOfElementsInSubArrays; j++) { 
     if (i*numberOfElementsInSubArrays+j < [array count]) { 
      NSLog(@"Array: %d Value:%@", i, [array objectAtIndex:i*numberOfElementsInSubArrays+j]); 
      [subArray addObject:[array objectAtIndex:i*numberOfElementsInSubArrays+j]]; 
     } 
    } 
    [manyArrays addObject:subArray]; 
} 

Answer 3

試試這個邏輯.....

NSArray *arr = [[NSArray alloc]initWithObjects:@"One",@"Two",@"Three",@"Four",@"Five",@"Six",@"Seven",nil]; 
NSMutableArray *arrNew = [[NSMutableArray alloc]init]; 
int numberofSubArrs = 3; // change this to check the logic 
for (int i=0; i<numberofSubArrs; i++) { 
    NSMutableArray *arrrr = [[NSMutableArray alloc]init]; 
    [arrNew addObject:arrrr]; 
} 
int m = 0; 
for (int k=0; k<[arr count]; k++) { 
    [[arrNew objectAtIndex:m]addObject:[arr objectAtIndex:k]]; 
    m++; 
    if (m == numberofSubArrs) { 
     m=0; 
    } 
} 
int g=0; 
int p=0; 
while(p<[arr count]) { 
    for (int z=0; z<[[arrNew objectAtIndex:g] count]; z++) { 
     [[arrNew objectAtIndex:g] replaceObjectAtIndex:z withObject:[arr objectAtIndex:p++]]; 
    } 
    g++; 
} 
NSLog(@"Required Array is:%@",[arrNew description]);