Question

我创建了一个带故事板的自定义UIViewController，这是类： .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

从主视图我创建了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，在双击事件后如何引用view1而不是view2，并使用方法setPlayerName？

非常感谢您的回答！

Answer 1

更改回调方法

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

您可以像这样获取视图的标记：

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

您可以保留代码并使用此帖Get to UIViewController from UIView?

调用setPlayerName

但是，我建议这样：

gesture的目标设定为myPlayerViewController

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:myPlayerViewController action:@selector(doDoubleTap:)];
在＆＃34;主视图＆＃34;中保留myPlayerViewController的引用通过如下数组：

[arrPlayerView addObject:myPlayerViewController]; /// keep pointing to myPlayerViewController, so it isn't released.
将(void)doDoubleTap:(UITapGestureRecognizer *)gesture放入PlayerViewController

xcode - 自定义视图的多个实例

1 个答案: