Xcode:如何在图像触摸时更改图像(相同位置)?

时间:2010-03-12 10:57:57

标签: objective-c iphone xcode uiimage touch

简单地说,我已经在UIView中使用Interface Builder放置了一个图像。现在我想在触摸该图像时运行方法/功能,例如当应该加载另一个图像时。

我的代码:

- (void)touchesended:(NSSet*) touches withEvent:(UIEvent *)event 
{
    // UITouch *touch = [touch anyObject];
    bild_1_1.image = [UIImage imageNamed:@"t_1_4.jpg"];
}

4 个答案:

答案 0 :(得分:2)

通过使用方法setBackgroundImage:forState:在TouchUpInside事件处理程序中放置UIButton而不是UIImage并更改其背景图像,可以轻松完成所需内容。

答案 1 :(得分:2)

您需要处理来自UIView的触摸事件。要做到这一点,你应该创建UIView的子类并添加你的 touchesBegan:withEvent:方法的实现,这里最简单的例子:

//  TouchSimpleView.h
@interface TouchSimpleView : UIImageView {
    id  delegate;
}
@property(retain) id delegate;
@end

@interface NSObject(TouchSimpleView)
-(void)didTouchView:(UIView *)aView;
@end 

//  TouchSimpleView.m
#import "TouchSimpleView.h"
@implementation TouchSimpleView
@synthesize delegate;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"touchesBegan!!! ");
    if ( delegate != nil && [delegate respondsToSelector:@selector(didTouchView:)] ) {
        [delegate didTouchView:self];
    } 
    [super touchesBegan:touches withEvent:event];
}
@end

然后,当您想要处理触摸时,可以使用此类的视图,例如:

- (void)applicationDidFinishLaunching:(UIApplication *)application {    
    [window makeKeyAndVisible];
    touchView = [[TouchSimpleView alloc] initWithFrame:CGRectMake(50, 50, 200, 300)];
    touchView.delegate = self;
    [window addSubview:touchView];

    imageView =[[UIImageView alloc] initWithFrame:touchView.frame];
    imageView.image = [UIImage imageNamed:@"image1.png"];
    [touchView addSubview:imageView];
}

-(void)didTouchView:(UIView *)aView{
    NSLog(@"view touched, changing image");
    imageView.image = [UIImage imageNamed:@"image2.png"];
}

答案 2 :(得分:1)

另一种解决方案:

<。>文件中的

放置一个 IBOutlet UIImagView * imageButton;

-(IBAction)doSomething:(id)sender;
<。>文件中的

-(IBAction)dosomething:(id)sender {

    // your code

   [imageButton setImage:[UIImage imageNamed:@""t_1_4.jpg"} forState:UIControlStateNormal];
}

我的代码非常好

答案 3 :(得分:0)

它可以在不创建子类的情况下与我合作,在.h文件中添加UIImageView

#import <UIKit/UIKit.h>
@interface YourClassName : UIViewController{
    IBOutlet UIImageView *wallpaper;
}
@property (nonatomic, retain) IBOutlet UIImageView *wallpaper;
@end

然后在.m中你可以使用你的方法

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [wallpaper setImage:[UIImage imageNamed: @"image.png"]];
}