给控件添加单击事件－－UITapGestureRecognizer

在Iphone开发中，像UIimageView是不支持点击的，但往往我们却有很多能在Image上点击的需求，比如一个自定义的TableViewCell中放入三个UIimageView，在这里命名为imageleft，imagemiddle，imggeright，当tableView加载后，单击tableView中某一行中的image，我便进入该图片的详细页面。

当然，现在的最新版支持手势控件，只要拖一个这样的控件到UIImageView上，实现它的委托就可以了。若版本太低不支持这样的控件，你便只好老老实实的亲手写代码了。

#import <UIKit/UIKit.h>



@protocol TableGridViewCellDelegate;



@interface TableGridViewCell : UITableViewCell {



}



@property (nonatomic,retain) IBOutlet UIImageView *imageleft;

@property (nonatomic,retain) IBOutlet UIImageView *imagemiddle;

@property (nonatomic,retain) IBOutlet UIImageView *imageright;

@property (nonatomic,assign) id<TableGridViewCellDelegate> delegate;

...

- (void) configGesture;

- (void) handTap:(UITapGestureRecognizer*) gesture;
...

@end



@protocol TableGridViewCellDelegate <NSObject>

- (void) tapedImageViewInCell:(UITableViewCell*)cell withIndex:(int)index;

@end



//m文件

#import "TableGridViewCell.h"



@implementation TableGridViewCell



@synthesize imageleft,imagemiddle,imageright,delegate;



- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier

{

    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];

    if (self) {

        // Initialization code

    }

    return self;

}



- (void)setSelected:(BOOL)selected animated:(BOOL)animated

{

    [super setSelected:selected animated:animated];



    // Configure the view for the selected state

}



-(void) dealloc{

    SAFE_RELEASE(imageleft);

    SAFE_RELEASE(imagemiddle);

    SAFE_RELEASE(imageright);

    [super dealloc];

}



- (void) configGesture

{

    UITapGestureRecognizer *_left = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handTap:)];

    [imageleft addGestureRecognizer:_left];

    SAFE_RELEASE(_left);

    

    UITapGestureRecognizer *_mid = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handTap:)];

    [imagemiddle addGestureRecognizer:_mid];

    SAFE_RELEASE(_mid);

    

    UITapGestureRecognizer *_right = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handTap:)];

    [imageright addGestureRecognizer:_right];

    SAFE_RELEASE(_right);

}



- (void) handTap:(UITapGestureRecognizer*) gesture

{

    if ([delegate respondsToSelector:@selector(tapedImageViewInCell:withIndex:)]) {

        UIImageView *v = (UIImageView*)gesture.view;

        [delegate tapedImageViewInCell:self withIndex:v.tag];

    }

}


#pragma mark -
#pragma mark TableGridViewCellDelegate
- (void) tapedImageViewInCell:(UITableViewCell*)cell withIndex:(int)index
{
    int row = [myTable indexPathForCell:cell].row;
    VODItem *it = (VODItem*)[ipListarry objectAtIndex:row*3+index];
    NSString *preview_Url = [[NSString alloc] initWithFormat:@"%@",it.Preview_Url];

    IPCellDetailInfo *IPCellDetailInfoController = [[IPCellDetailInfo alloc]init];
    IPCellDetailInfoController.ClipDetialsInterfaceUrl=it.ClipDetialsInterfaceUrl;
    IPCellDetailInfoController.ClipDetialsTitle = it.Primary_Name;
    IPCellDetailInfoController.btnPlayOrViewTitle = it.Sndlvl_Desc;
　　
    [self.navigationController pushViewController:IPCellDetailInfoController animated:YES]; //新视图压入到栈中
    [IPCellDetailInfoController release];
    
    NSLog(@"row = [%d], col = [%d], Preview_Url = [%@]", row, index,preview_Url);
    [preview_Url release];
}

@end

好了  其实主要就是要会使用UITapGestureRecognizer，当然这只是手势的其中一个。下面还有几个如：

• UITapGestureRecognizer
• UIPinchGestureRecognizer
• UIRotationGestureRecognizer
• UISwipeGestureRecognizer
• UIPanGestureRecognizer
• UILongPressGestureRecognizer

从命名上不难了解這些类別所对应代表的手势，分別是 Tap（点一下）、Pinch（二指往內或往外拨动）、Rotation（旋转）、Swipe（滑动，快速移动）、Pan （拖移，慢速移动）以及 LongPress（长按）。