Question

如何使用普通的javascript在iPad上禁用Safari上的所有默认手势。我已尝试对每个事件使用event.preventDefault();，但它无效。我在Safari中运行应用程序，我想禁用所有默认触摸事件（手势）并使用我自己的覆盖。我也尝试过使用一个受欢迎的库hammer.js，它有一个选项prevent_default但是没有用。

Answer 1

阻止滚动：

document.ontouchmove = function(event){
event.preventDefault();}

防止点击：

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"/>

Answer 2

我认为你的问题不够明确（请更改）。你的意思是你有一个带有UIWebView的iOS应用程序，你想要禁用该UIWebView上的所有鼠标交互吗？如果是这样，那么你必须禁用滚动，例如：

<script type="text/javascript">
touchMove = function(event) {
    event.preventDefault();
}
</script>

UIWebViews不会将触摸和访客传递给下面的视图。如果要处理本机代码中的触摸，只需将通配符GestureRecognizer添加到UIWebView即可。您可以在下面看到可以使用的帮助程序类。您可以通过调用：

在UIWebView上使用它

[[WildcardGestureRecognizerForwarder alloc] initWithController:self andView:self.webview];

在您的项目中，使用以下代码添加WildcardGestureRecognizerForwarder.h：

    #import <Foundation/Foundation.h>

typedef void (^TouchesEventBlock)(NSSet * touches, UIEvent * event);

@interface WildcardGestureRecognizerForwarder : UIGestureRecognizer

@property(nonatomic,assign) UIView *forwardFrom;
@property(nonatomic,assign) UIViewController *forwardTo;

-(void) initWithController:(UIViewController*)theViewController andView:(UIView*)theView;
@end

还使用以下代码添加WildcardGestureRecognizerForwarder.m文件：

#import "WildcardGestureRecognizerForwarder.h"

@implementation WildcardGestureRecognizerForwarder

-(id) init {
    if (self = [super init])
    {
        self.cancelsTouchesInView = NO;
    }
    return self;
}

-(void) initWithController:(id)theViewController andView:(UIView*)theView {
    if ([self init]) {
        self.forwardFrom = theView;
        self.forwardTo = theViewController;
        [theView addGestureRecognizer:self];
        self.delegate = theViewController;
    }
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if(self.forwardTo)
        [self.forwardTo touchesBegan:touches withEvent:event];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    if(self.forwardTo)
        [self.forwardTo touchesCancelled:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    if(self.forwardTo)
        [self.forwardTo touchesEnded:touches withEvent:event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    if(self.forwardTo)
        [self.forwardTo touchesMoved:touches withEvent:event];
}

- (void)reset
{
}

- (void)ignoreTouch:(UITouch *)touch forEvent:(UIEvent *)event
{
}

- (BOOL)canBePreventedByGestureRecognizer:(UIGestureRecognizer *)preventingGestureRecognizer
{
    return NO;
}

- (BOOL)canPreventGestureRecognizer:(UIGestureRecognizer *)preventedGestureRecognizer
{
    return NO;
}

@end

防止iPad Safari上的所有默认手势

2 个答案: