小結：

NSArray有序的集合；

NSDictionary無序的集合，可排序； 增刪改查

?

------NSArray-----------

?create :

1)NSArray *array = [NSArray arrayWithObjects:@"Henry",@"Jones", @"Susan", @"Smith", @"Patty", @"Johnson", nil];?

2)NSArray *myArray = [NSArray arrayWithArray:array];

NSLog(@"%@", myArray);?

3)?NSMutableArray *array = [[NSMutableArray alloc]?initWithObjects: @"Foo", @"Bar", @"FooBar", nil];?

4)?NSMutableArray *array2 = [NSMutableArray arrayWithCapacity: 3];

//Add an object

[array2 addObject: @"Foo"];

//Add another object

[array2 addObject: @"Bar"];

//Insert an object at a particular index

[array2 insertObject: @"FooBar" atIndex: 1];?

5)?int n = 15;

NSMutableArray *numberArray = [[NSMutableArray alloc] initWithCapacity:n];

//srand(time(0));

srandom(time(NULL));

for(int i = 0; i < n; i++)

[numberArray addObject:[NSNumber numberWithInt:arc4random()%n]];

NSLog( @"%@", numberArray);

?

sort:

NSArray *sortedArray =?

? [array sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];?

?

?

---------dictionary--------------

NSArray? *keys = [NSArray arrayWithObjects:@"key1", @"key2", @"key3", nil];

? ? NSArray *objects = [NSArray arrayWithObjects:@"How", @"are", @"you", nil];

? ? NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];

//Case 1, loop through?

for (id key in dictionary) {

? ? ? ? NSLog(@"key: %@, value: %@", key, [dictionary objectForKey:key]);

? ? }

//Case 2, loop through?

NSEnumerator *enumerator;

? ? id key;

enumerator = [dictionary keyEnumerator]; ? ?

? ? while ((key = [enumerator nextObject])){ ?

? ? ? ? NSLog(@"%@====>%@", key, [dictionary objectForKey:key]);

? ? }

?

轉載于:https://www.cnblogs.com/csj007523/archive/2012/07/20/2600889.html

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