Question

我将所有图像存储在SQLiteManager中以供本地数据库使用。之后我添加了将图像提取到图像阵列。然后将图像数组添加到UIButton以进行单击事件。在scrollview上一切正常。但是如何添加来自数据库的单击事件单独的图像。我需要为每张图片应用单独的动作。

代码：

的SQLiteManager：

Table name: SimpleTbl


      id    sm     descrip        photo
        1      sm1    ok            BLOB(size:2345)

        2      sm2    ok1            BLOB(size:3245)

        3      sm3    ok2            BLOB(size:4535)

        4      sm4    ok3            BLOB(size:2545)

        5      sm5    ok4            BLOB(size:3445)

        6      sm6    ok5            BLOB(size:4535)

.h文件：

@interface Mysof : NSObject{
    NSInteger sofId;
    NSString *sof;
    NSString *rating;
    UIImage *photo;
}

@property (nonatomic,retain)NSString *sof;
@property (nonatomic, assign) NSInteger sofId;
@property (nonatomic, retain)NSString *rating;
@property (nonatomic, retain) UIImage *photo;

.m文件：

- (NSMutableArray *) getMylists{
    NSMutableArray *sArray = [[NSMutableArray alloc] init];
    @try {
        NSFileManager *fileMgr = [NSFileManager defaultManager];
        NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"Sample.sqlite"];
        BOOL success = [fileMgr fileExistsAtPath:dbPath];
        if(!success)
        {
            NSLog(@"Cannot locate database file '%@'.", dbPath);
        }
        if(!(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK))
        {
            NSLog(@"An error has occured.");
        }

      ;


        const char *sql = "SELECT * FROM SimpleTbl";       


        NSLog(@"sql is %s", sql);

        sqlite3_stmt *sqlStatement;
        if(sqlite3_prepare(db, sql, -1, &sqlStatement, NULL) != SQLITE_OK)
        {
            NSLog(@"Problem with prepare statement");
        }

        //
        while (sqlite3_step(sqlStatement)==SQLITE_ROW) {
            Mysof *Mylist = [[Mysof alloc]init];
            Mylist.sofId = sqlite3_column_int(sqlStatement, 0);
            Mylist.sof = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,1)];
            Mylist.rating = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement, 2)];
            const char *raw = sqlite3_column_blob(sqlStatement, 3);
            int rawLen = sqlite3_column_bytes(sqlStatement, 3);
            NSData *data = [NSData dataWithBytes:raw length:rawLen];
            Mylist.photo = [[UIImage alloc] initWithData:data];
            [sArray addObject:Mylist];
        }
    }
    @catch (NSException *exception) {
        NSLog(@"An exception occured: %@", [exception reason]);
    }
    @finally {
        return sArray;
    }

}

在viewcontroller中，我将获取图像显示给UIButton以进行点击事件：

-(void)click:(id)sender{

scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
        scroll.pagingEnabled = YES;

        for (int i = 0; i<[self.arraysofs count]; i++ ) {
            NSLog(@"index %d",i);


             imgView1=[[UIButton alloc]initWithFrame:CGRectMake(20+(i*74), 420, 72, 72)];

              [imgView1 addTarget:self action:@selector(imgViewClicked:) forControlEvents:UIControlEventTouchUpInside];

            [imgView1 setImage:((Mysof *)[self.arraysofs objectAtIndex:i]).photo forState:UIControlStateNormal];

            [scroll addSubview:imgView1];

    }

[scroll setContentSize:CGSizeMake(CGRectGetMaxX(imgView1.frame),self.view.frame.size.height)];

    [self.view addSubview:scroll];

}

点击UIButton图像数组的事件：

-(void)imgViewClicked:(id)sender{

   NSLog(@"button %d is clicked.", [sender tag]-1);


mmageView=[[UIImageView alloc]initWithFrame:CGRectMake(50,50,150,150)];

 [mmageView setImage:((Mysof *) [self.arraysofs objectAtIndex:[sender tag]-1]).photo];

[self.view addSubview:mmageView];


UIPanGestureRecognizer *dbpan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(ondbPan:)];

[mmageView addGestureRecognizer:dbpan];

}

平移功能：

- (void)ondbPan:(UIPanGestureRecognizer *)pan {

    CGPoint offset = [pan translationInView:mmageView];

    CGPoint center = pan.view.center;
    center.x += offset.x;
    center.y += offset.y;
    pan.view.center = center;

    [pan setTranslation:CGPointZero inView:mmageView];
}

Answer 1

只需使用currentImage方法从点击的按钮获取图片。

-(void)imgViewClicked:(id)sender
{
    UIImage *image = [sender currentImage];
    // Show image where you want to show

    [self showImageOnCenter:image];
}

用于在中心显示图像

-(void)showImageOnCenter:(UIImage *)image
{
    // You can set the frame according to you and also implement the close functionality too
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, 200.0, 200.0)];
    [imageView setImage:image];
    [imageView setCenter:self.view.center];
    [self.view addSubview:imageView];
}

Answer 2

尝试这样，

-(void)imgViewClicked:(id)sender {

    UIButton *imgBtn = (UIButton *)sender;
    UIImage *img = [imgBtn imageForState:UIControlStateNormal];
}

或

-(void)imgViewClicked:(UIButton *)sender {

    UIImage *img = [sender imageForState:UIControlStateNormal];
}

单个图像的UIScrollview单击事件

2 个答案: