-(id)init 和 +initializer 的区别。

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    ViewController *v = [[ViewController alloc] init];
}

-(id)init{
    if (self = [super init]) {
        NSLog(@"ddddd");
    }
    return self;
}

+(void)initialize{
    NSLog(@"string");
}

@end