Question

我一直在努力做点什么而且我无法帮助我。我有一个例如3的变量，我希望它在用户触摸屏幕时增加并保持它。例如，如果他只点击屏幕，变量将是3，如果他保持2秒变量将是5，如果他持有5秒，变量将是10.类似的东西，用户持有的越多更多变量将增加。请帮帮我！

Answer 1

只需在同一视图中添加多个手势识别器，即可实现您所描述的内容。您可能正在寻找的是UIGestureRecognizerDelegate协议中的gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:方法。

此方法允许同时识别多个手势，这不是手势识别器的默认行为。

以下代码完全符合您的描述。

@interface ViewController () <UIGestureRecognizerDelegate>

@property (nonatomic) NSUInteger variable;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.variable = 0;

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                          action:@selector(firstMethod)];
    UILongPressGestureRecognizer *press = [[UILongPressGestureRecognizer alloc] initWithTarget:self
                                                                                        action:@selector(secondMethod)];
    UILongPressGestureRecognizer *secondPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self
                                                                                        action:@selector(thirdMethod)];

    press.minimumPressDuration = 2;
    secondPress.minimumPressDuration = 5;

    press.delegate = self;
    secondPress.delegate = self;
    [self.view addGestureRecognizer:tap];
    [self.view addGestureRecognizer:press];
    [self.view addGestureRecognizer:secondPress];
}

- (void)firstMethod
{
    self.variable = 2;
    NSLog(@"%lu", (unsigned long)self.variable);
}

- (void)secondMethod
{
    self.variable = 5;
    NSLog(@"%lu", (unsigned long)self.variable);
}

- (void)thirdMethod
{
    self.variable = 10;
    NSLog(@"%lu", (unsigned long)self.variable);
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

@end

iOS持有手势

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