小编Mel*_*arr的帖子

我一直在看这段代码,但仍然感到困惑,为什么它不起作用.基本上:1.用户选择表格视图单元格2. UIScrollView是包含高分辨率图像或UIImage的调用.3.以下称为Map.m

#import "Map.h"

#define ZOOM_VIEW_TAG 100
#define ZOOM_STEP 1.5


@interface Map (UtilityMethods)
- (CGRect)zoomRectForScale:(float)scale withCenter:(CGPoint)center;
@end


@implementation Map

@synthesize imageScrollView, imageView;

- (void)loadView {
    NSLog(@"beginning of loadView in map.m");
    [super loadView];

    // set the tag for the image view
    [imageView setTag:ZOOM_VIEW_TAG];
    imageScrollView.scrollEnabled = NO;

    // add gesture recognizers to the image view
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
    UITapGestureRecognizer *twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerTap:)];

    [doubleTap setNumberOfTapsRequired:2];
    [twoFingerTap setNumberOfTouchesRequired:2];

    [imageView addGestureRecognizer:singleTap]; …