是否可以获得触摸的x和y坐标？ [英] Is it possible to get the x and y coordinates of a touch?

问题描述

是否可以获得触摸的x和y坐标？如果可以的话，请提供一个非常简单的示例，其中坐标仅记录到控制台中。

is it possible to get the x and y coordinates of a touch? If so could someone please provide a very simple example where the coordinates are just logged to the console.

推荐答案

使用touchesBegan事件

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchPoint = [touch locationInView:self.view];
    NSLog(@"Touch x : %f y : %f", touchPoint.x, touchPoint.y);
}

此事件在触摸开始时触发。

This event is triggered when touch starts.

使用手势

在 viewDidLoad：中注册UITapGestureRecognizer。方法

Register your UITapGestureRecognizer in viewDidLoad: Method

- (void)viewDidLoad {
    [super viewDidLoad];
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureRecognizer:)];
    [self.view setUserInteractionEnabled:YES];
    [self.view addGestureRecognizer:tapGesture];
}

设置tapGestureRecognizer函数

Setting up the tapGestureRecognizer function

// Tap GestureRecognizer function
- (void)tapGestureRecognizer:(UIGestureRecognizer *)recognizer {
    CGPoint tappedPoint = [recognizer locationInView:self.view];
    CGFloat xCoordinate = tappedPoint.x;
    CGFloat yCoordinate = tappedPoint.y;

    NSLog(@"Touch Using UITapGestureRecognizer x : %f y : %f", xCoordinate, yCoordinate);
}

示例项目

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