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iOSメモ - コードで画面遷移と値渡し

Last updated at Posted at 2014-07-19

頭の中の消しゴムの威力が強すぎる...


MainStoryboardのViewControllerにidentifierをつけよう

まず、値を渡したい側のViewControllerに、以下のようなidentifierをつける。
スクリーンショット 2014-07-19 21.23.42.png

以下のようなコードを書く

FirstViewController.m
- (IBAction)nextButton{
    SecondViewController *secondVC =  [self.storyboard instantiateViewControllerWithIdentifier:@"SecondViewController"];
    
    secondVC.secondNum = self.firstNum;
    [self presentViewController:secondVC animated:YES completion:nil];//YESならModal,Noなら何もなし

}
FirstViewController.h
#import "SecondViewController.h"
()
@property int firstNum;

Swift3 or 4

ViewController.swift
func nextButton() {
  let secondVC = storyboard?.instantiateViewController(withIdentifier: "SecondViewController")
  secondVC.secondNum = self.firstNum // FirstVCのpropertyであるfirstNumから、SecondVCのsecondNumに代入する
  present(secondVC, animated: true, completion: nil)
}

俺はpushで画面遷移したいんだ...

ViewController.h
//push
[self.navigationController pushViewController:secondVC animated:YES];

//push 2回閉じるとか
push による画面遷移から「戻る」方法3つ

その他

ViewController.h
//modal 2回閉じる
[self.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:NULL];
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