Missing '[' at start of message send expression

问题

I am getting this error message and matched my brackets and couldn't find anything wrong. Can you find what's wrong? I really need help. Please. The error I am getting is this "Missing '[' at start of message send expression" I have commented where it occurs down near the end of my code. Please help me.

Thank you.

@interface HomeViewOne ()

@end

@implementation HomeViewOne

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)switchScreenHome:(id)sender {

    //Code to switch screen from main menu to game
    ViewController *view [[ViewController alloc] initWithNibName:nil bundle:nil];  //My error is on this line, it says Missing '[' at start of message send expression
    [self presentModalViewController:view animated:YES];
}
@end

回答1:

The code is missing something useful, like an =.

Thus the [..] is not parsed in a meaningful fashion (i.e. as an expression used in an assignment) and results in the given syntax error.

The code is actually parsed as an variable array declaration, consider

X* x[..];

where .. is

[ViewController alloc] initWithNibName:nil bundle:nil

which results in "Missing '[' at start of message send expression", just as if that code appeared in a statement by itself. Adding another pair of []'s would "fix" that, and actually declare a variable-length array. However, you definetly don't want a VLA here.. just add the assignment operator already.

回答2:

That line should be:

ViewController *view = [[ViewController alloc] initWithNibName:nil bundle:nil];  //My error is on this line, it says Missing '[' at start of message send expression

you need to add a "=".

回答3:

The line with the error should actually be:

ViewController *view = [[ViewController alloc] initWithNibName:nil bundle:nil];

Note the '=' character

来源：https://stackoverflow.com/questions/22737673/missing-at-start-of-message-send-expression

标签

objective-c

syntax-error