NSString int(long) 変換
NSString -> int
integerValue
NSString *test = @"12"; int val = [test integerValue];
int -> NSString
int val = 12; NSString *test = [NSString stringWithFormat:@"%d", val];
NSString -> long
NSString *test = @"11111111"; long val = [test longLongValue];
Use longLongValue