cocoa: よく使う文字列操作

とりあえずこの 3 つをおさえておけば大丈夫そう。

連結

• NSString *stringB = [stringA stringByAppendingString:@"hogehoge"];
• NSString *stringC = [stringA stringByAppendingString:@"%d", 1];

比較

• BOOL result = [stringA isEqualToString:@"hogehoge"];
• BOOL result = [stringA hasPrefix:"ho"]; // startswith
• BOOL result = [stringA hasSuffix:"ge"]; // endswith

長さ

• unsigned int len = [string length]; // [@"ほげ" length] == 2