// 1.使用標準的c字串來建立oc字串
/*char *cstr = "this is a stirng";
nsstring *ocstr = [nsstring stringwithutf8string:cstr];
nslog(@"oc stirng:%@", ocstr);*/
// 2.比較字串是否相等
/*nsstring *str1 = @"this is a string";
nsstring *str2 = @"this is a string";
bool result = [str1 isequal:str2];
nslog(@"result:%d", result);*/
// 3.比較字串的大小
/*nsstring *str1 = @"this is a string";
nsstring *str2 = @"this is a oc string";
bool result = [str1 compare:str2];
// result 是3種結果之一：nsorderedsame;nsorderedascending;nsordereddescending;
nslog(@"result:%d", result);*/
// 4.不考慮字串大小寫比較
/*nsstring *str1 = @"this is a string";
nsstring *str2 = @"this is a string";
bool result = [str1 caseinsensitivecompare:str2];
// result 是3種結果之一：nsorderedsame;nsorderedascending;nsordereddescending;
nslog(@"result:%d", result);*/
// 5.查詢子字串
/*nsstring *str1 = @"this is a string";
nsstring *str2 = @"string";
nsrange range = [str1 rangeofstring:str2];
nslog(@"range.location:%d, range.length%d", range.location, range.length);*/
// 6.從開頭擷取字串到指定的位置(不包含最後指定位置的字元）
/*nsstring *str1 = @"this is a string";
nsstring *str2 = [str1 substringtoindex:3];
// 指定位置的索引值不能大於字串str1的長度
nslog(@"str2:%@", str2);*/
// 7.從指定的位置擷取字串到末尾
/*nsstring *str1 = @"this is a string";
nsstring *str2 = [str1 substringfromindex:3];
// 指定位置的索引值不能大於字串str1的長度
nslog(@"%@", str2);*/
// 8.擷取任意字串(由開始位置和長度決定）
/*nsstring *str1 = @"this is a string";
nsstring *str2 = [str1 substringwithrange:nsmakerange(1, 3)];
nslog(@"str2:%@", str2);
*/// 9.判斷乙個字串是否是以另乙個字串開頭
/*nsstring *str1 = @"this is a string";
nsstring *str2 = @"this";
bool result = [str1 hasprefix:str2];
nslog(@"result:%d", result);
*/// 10.// 9.判斷乙個字串是否是以另乙個字串結尾
/*nsstring *str1 = @"this is a string";
nsstring *str2 = @"string";
bool result = [str1 hassuffix:str2];
nslog(@"result:%d", result);*/
// 11.分割字串
/*nsstring *str1 = @"this is a string";
nsarray *array = [str1 componentsseparatedbystring:@" "];
nslog(@"array:%@", array);
*/// 12.
/*nsstring *str = @"this is a string";
nsarray *array = [str componentsseparatedbycharactersinset:[nscharacterset whitespacecharacterset]];
nslog(@"array:%@", array);*/
// 13.組合字串
/*nsarray *array = @[@"this", @"is", @"a", @"string"];
nsstring *str1 = [array componentsjoinedbystring:@" "];
nslog(@"str1:%@", str1);*/
// 14.其他關於路徑的功能(字串關於路徑的操作可以參考相關的函式）
/*nsstring *str1 = @"root/temp/test";
nslog(@"str:%@", str2);
*/
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