NSArray 与字符串

    NSArray *arr = @[@"lnj", @"lmj", @"jjj", @"xcq"];
    NSString *res = [arr componentsJoinedByString:@"*"];
    NSLog(@"res = %@", res);
输出结果:
lnj*lmj*jjj*xcq

    NSString *str = @"lnj-lmj-jjj-xcq";
    NSArray *arr = [str componentsSeparatedByString:@"-"];
    NSLog(@"%@", arr);

输出结果:
(
    lnj,
    lmj,
    jjj,
    xcq
)