Question

每当触摸特定的UIViewController时，我想调用一个方法。

-touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event是一种能够完成我正在寻找的方法，不管它在状态栏，导航栏或工具栏上都没有检测到触摸。如何在每次触摸UIViewController时创建一个运行的方法？或者换句话说，整个屏幕？

Answer 1

尝试添加手势识别。到你的window对象，因为它是uiview的子类。

或者像@Bamsworld说的那样。 “对于全屏检测（包括状态栏），我认为您需要子类UIWindow并使其成为becomeFirstResponder:覆盖触摸并从窗口子类处理。”

Answer 2

子类UIApplication说MyApplication并实现方法

- (void)sendEvent:(UIEvent *)event {
    [super sendEvent:event];
    // Do whatever you want
}

然后在main.m中将默认实现更改为

int main(int argc, char *argv[])
{
    @autoreleasepool {
        return UIApplicationMain(argc, argv, NSStringFromClass([MyApplication class]), NSStringFromClass([YourAppdelegate class]));
    }
}

您将获得方法

中的每个操作

- (void)sendEvent:(UIEvent *)event

Answer 3

#import <QuartzCore/QuartzCore.h>

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.view setMultipleTouchEnabled:YES];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // Remove old red circles on screen
    NSArray *subviews = [self.view subviews];
    for (UIView *view in subviews) {
        [view removeFromSuperview];
    }
    // Enumerate over all the touches and draw a red dot on the screen where the touches were
    [touches enumerateObjectsUsingBlock:^(id obj, BOOL *stop) {
        // Get a single touch and it's location
        UITouch *touch = obj;
        CGPoint touchPoint = [touch locationInView:self.view];
        // Draw a red circle where the touch occurred
        UIView *touchView = [[UIView alloc] init];
        [touchView setBackgroundColor:[UIColor redColor]];
        touchView.frame = CGRectMake(touchPoint.x, touchPoint.y, 30, 30);
        touchView.layer.cornerRadius = 15;
        [self.view addSubview:touchView];
        [touchView release];
    }];
}

检测整个屏幕上的触摸

3 个答案: