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）。