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import “ViewController.h”

@interface ViewController ()

@end

define kBounds [UIScreen mainScreen].bounds.size

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];

  UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
  label.center = self.view.center;
  label.text = @”点屏幕”;
  [label setBackgroundColor:[UIColor clearColor]];
  [self.view addSubview:label];

}

• (void)touchesBegan:(NSSet