我如何添加一个触摸事件到一个UIView?
我试一试:
UIView *headerView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, nextY)] autorelease];
[headerView addTarget:self action:@selector(myEvent:) forControlEvents:UIControlEventTouchDown];
// ERROR MESSAGE: UIView may not respond to '-addTarget:action:forControlEvents:'
我不想创建一个子类然后重写
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
在Swift 4.2和Xcode 10中
使用UITapGestureRecognizer for添加触摸事件
//Add tap gesture to your view
let tap = UITapGestureRecognizer(target: self, action: #selector(handleGesture))
yourView.addGestureRecognizer(tap)
// GestureRecognizer
@objc func handleGesture(gesture: UITapGestureRecognizer) -> Void {
//Write your code here
}
如果你想使用SharedClass
//This is my shared class
import UIKit
class SharedClass: NSObject {
static let sharedInstance = SharedClass()
//Tap gesture function
func addTapGesture(view: UIView, target: Any, action: Selector) {
let tap = UITapGestureRecognizer(target: target, action: action)
view.addGestureRecognizer(tap)
}
}
我的ViewController中有3个视图,分别是view1 view2和view3。
override func viewDidLoad() {
super.viewDidLoad()
//Add gestures to your views
SharedClass.sharedInstance.addTapGesture(view: view1, target: self, action: #selector(handleGesture))
SharedClass.sharedInstance.addTapGesture(view: view2, target: self, action: #selector(handleGesture))
SharedClass.sharedInstance.addTapGesture(view: view3, target: self, action: #selector(handleGesture2))
}
// GestureRecognizer
@objc func handleGesture(gesture: UITapGestureRecognizer) -> Void {
print("printed 1&2...")
}
// GestureRecognizer
@objc func handleGesture2(gesture: UITapGestureRecognizer) -> Void {
print("printed3...")
}
你可以通过在代码中添加手势识别器来实现这一点。
步骤1:ViewController.m:
// Declare the Gesture.
UITapGestureRecognizer *gesRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(handleTap:)];
gesRecognizer.delegate = self;
// Add Gesture to your view.
[yourView addGestureRecognizer:gesRecognizer];
步骤2:ViewController.m:
// Declare the Gesture Recogniser handler method.
- (void)handleTap:(UITapGestureRecognizer *)gestureRecognizer{
NSLog(@"Tapped");
}
注意:这里的yourView在我的情况是@property(强,非原子)IBOutlet UIView *localView;
编辑:*localView是Main中的白色框。下面的故事板