我试图能够使用触摸来拖动各种图像。到目前为止,我试图让它只使用 1 张图像,但它不起作用(即我无法用手指移动图像)。我究竟做错了什么?
我有几个包含以下代码的文件:
拖动视图.h
@interface DragView : UIImageView {
}
@end
拖动视图.m
#include "DragView.h"
@implementation DragView
- (void)touchesMoved:(NSSet *)set withEvent:(UIEvent *)event {
CGPoint p = [[set anyObject] locationInView:self.superview];
self.center = p;
}
@end
视图控制器.h
#import <UIKit/UIKit.h>
#import "DragView.h"
@interface ViewController : UIViewController {
}
@property (nonatomic, strong) DragView *basketView;
@end
视图控制器.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize basketView;
- (void)viewDidLoad
{
[super viewDidLoad];
basketView = [[DragView alloc]
initWithImage:[UIImage imageNamed:@"basket.png"]];
basketView.frame = CGRectMake(140, 340.2, 60, 30);
[self.view addSubview:basketView];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end