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在看到一些示例之后，我正在尝试创建一个可以使用 PanGestureRecognizer 移动图像视图的窗口。我不明白缺少什么。

  • 我创建并初始化了一个 UIView 对象
  • 我还为两个视图创建了一个用于平移的 UIGestureRecognizer。
  • 我创建了识别手势时要选择的方法。

如果您对缺少的内容有所了解，我将不胜感激。

这是我的代码：

查看控制器.h

#import <UIKit/UIKit.h>
#import "bouton.h"

@interface ATSViewController : UIViewController {
    boutonHome *bouton; }

@property (retain, nonatomic) boutonHome *bouton;

-(IBAction)handlePanGesture:(UIPanGestureRecognizer*)sender;

@end

查看控制器.m

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIImage *image = [UIImage imageNamed:@"back.png"];
    CGRect frame = CGRectMake(0, 0, image.size.width, image.size.height);

    // Set self's frame to encompass the image
    bouton.frame = frame;
    bouton.boutonImage = image;

    [self.view addSubview:bouton];  

    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesture:)];

    [bouton setUserInteractionEnabled:YES];
    [bouton addGestureRecognizer:panGesture];

    [self.view setUserInteractionEnabled:YES];
    [self.view addGestureRecognizer:panGesture];

    // Do any additional setup after loading the view, typically from a nib.
}

-(IBAction)handlePanGesture:(UIPanGestureRecognizer *)sender
{
    CGPoint translate = [sender translationInView:self.view]; 

    CGRect newFrame = bouton.frame;
    newFrame.origin.x += translate.x;
    newFrame.origin.y += translate.y;
    sender.view.frame = newFrame;

    if(sender.state == UIGestureRecognizerStateEnded)
    bouton.frame = newFrame;
}

BoutonHome.h

#import <Foundation/Foundation.h>

@interface boutonHome : UIView
{
    UIImage *boutonImage;
}

@property (nonatomic, retain) UIImage *boutonImage;


// Initializer for this object


@end

布顿家.m

#import "bouton.h"

@implementation boutonHome

@synthesize boutonImage;


@end
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