nsarray *array = [nsarray
arraywithobjects:@"one", @"two", @"three", nil];
nslog(@"%d", array.count);
// 訪問陣列的第乙個元素
nslog(
@"%@"
, [arrayobjectatindex:
0]);
// 最後乙個元素位置為array.count - 1
// nslog(@"%@", [array objectatindex:array.count]);
//動態陣列
nsmutablearray*marray = [nsmutablearray
arraywitharray
:array];
[marray addobject:@"four"];
[marray removeobjectatindex:2];
nslog(@"%@", marray);
// 合併陣列
nslog(
@"%@"
, [arrayarraybyaddingobjectsfromarray:marray]);
// 檢查陣列
if ([marraycontainsobject:@"four"])
nslog
(@"the index is %d", [marray
indexofobject
:@"four"]);
// 組成陣列
nslog(
@"%@"
, [arraycomponentsjoinedbystring:
@" "
]);
// 可變字典
nsmutabledictionary*dict = [nsmutabledictionary
dictionary
];[dict setobject:
@"1"
forkey:
@"a"
];[dict setobject:
@"2"
forkey:
@"b"
];[dict setobject:
@"3"
forkey:
@"c"
];nslog(
@"%@"
, [dictdescription]);
// 字典查詢
nslog(
@"%@"
, [dictobjectforkey:
@"a"
]);nslog(
@"%@"
, [dictobjectforkey:
@"f"
]);
// 替代字典元素
[dict setobject:
@"foo"
forkey:
@"c"
];nslog(
@"%@"
, [dictobjectforkey:
@"c"
]);
// 刪除字典元素
[dict removeobjectforkey:
@"b"];
//字典元素數量及keys
nslog
(@"the dictionary has %d objects", [dict
count
]);nslog(@"%@", [dictallkeys]);
// 把字典元素寫入檔案後讀出
nsstring
@"documents/arraysample.txt"
];if
([arraywritetofile:path atomically:
yes])
nslog
(@"file was written successfully");
nsarray *newarray = [nsarray
arraywithcontentsoffile:path];
nslog(@"%@", newarray);
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