xcode - 自定义视图的多个实例

Question

我创建了一个带有故事板的自定义 UIViewController，这是 class： .h 文件：

#import <UIKit/UIKit.h>

@interface PlayerViewController : UIViewController

@property (weak, nonatomic) IBOutlet UILabel *PlayerNumber;
@property (weak, nonatomic) IBOutlet UIImageView *PlayerImage;
@property (weak, nonatomic) IBOutlet UILabel *PlayerNameLabel;

-(void)setPlayerName:(NSString*)PlayerNameString;

@end

.m 文件：

#import "PlayerViewController.h"

@interface PlayerViewController ()

@end

@implementation PlayerViewController
@synthesize PlayerImage,PlayerNameLabel,PlayerNumber;


- (void)viewDidLoad {
[super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}

-(void)setPlayerName:(NSString *)PlayerNameString{
self.PlayerNameLabel.text=PlayerNameString;
}

@end

我从主视图创建了 2 个 PlayerViewController 实例以显示 2 个自定义视图：

- (void)viewDidLoad {
[super viewDidLoad];

[self DrawPlayerWithTag:1];
[self DrawPlayerWithTag:2];
}


- (void)DrawPlayerWithTag:(int)PlayerTag{
PlayerViewController *myPlayerViewController = [self.storyboard  instantiateViewControllerWithIdentifier:@"PlayerViewController"];
UIView *myPlayerView=myPlayerViewController.view;
myPlayerView.tag=PlayerTag;
myPlayerView.frame=CGRectMake(0, 0, 100, 100);
myPlayerView.center = CGPointMake(self.view.frame.size.width / 2,
                                 self.view.frame.size.height / 2);

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doDoubleTap)];
doubleTap.numberOfTapsRequired = 2;
[myPlayerView addGestureRecognizer:doubleTap];


[self.view addSubview:myPlayerView];
[myPlayerViewController setPlayerName:@"NameA"];

}

似乎有效。 但是，如果我想更改 PlayerName，如何在双击事件后引用 view1 而不是 view2，并使用方法 setPlayerName?

非常感谢您的回答！

Answer 1

更改回调方式

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doDoubleTap:)];

你可以这样获取视图的标签：

-(void)doDoubleTap:(UITapGestureRecognizer *)gesture{
   NSLog(@"%ld", gesture.view.tag);
}

您可以保留您的代码并使用此 post Get to UIViewController from UIView?

调用 setPlayerName

但是，我建议这样：

• 为 gesture 设置的目标是 myPlayerViewController

  UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:myPlayerViewController action:@selector(doDoubleTap:)];

• 通过数组将 myPlayerViewController 的引用保存在 "main view" 中，例如：

  [arrPlayerView addObject:myPlayerViewController]; /// keep pointing to myPlayerViewController, so it isn't released.

• 将(void)doDoubleTap:(UITapGestureRecognizer *)gesture放在PlayerViewController

中