[英]Drag UITextField around UIView (Swift)
Here is my code 这是我的代码
import UIKit
class ForwardTextField: UITextField {
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func drawRect(rect: CGRect) {
// Drawing code
}
*/
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesBegan(touches, withEvent: event)
self.nextResponder()!.touchesBegan(touches, withEvent: event)
NSLog("Textfield Touches Began")
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesMoved(touches, withEvent: event)
self.nextResponder()!.touchesMoved(touches, withEvent: event)
NSLog("Textfield Touches Moved")
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesEnded(touches, withEvent: event)
self.nextResponder()!.touchesEnded(touches, withEvent: event)
NSLog("Textfield Touches Ended")
}
override func touchesCancelled(
touches: Set<UITouch>?, withEvent event: UIEvent?) {
super.touchesCancelled(touches, withEvent: event)
self.nextResponder()!.touchesCancelled(touches, withEvent: event)
//NSLog(@"Textfield Touches Cancelled");
}
// placeholder position
override func textRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds, 10, 10)
}
// text position
override func editingRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds, 10, 10)
}
} }
I subclass my UITextField
and i was trying to drag around the view but i don't know where i was doing wrong.When first touch it can't be drag but on second touch it jumps to another position and can be draggable.Can anyone help me solved this, it been a while now still stuck on this.I was trying to do something like snapchat textfield which is draggable. 我将我的UITextField
子类化,并且试图在视图周围拖动,但是我不知道自己在哪里做错了。帮助我解决了这个问题,已经有一段时间了,我一直在尝试做。
var textField = ForwardTextField()
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("TOUCHES BEGAN\n ")
print("self.textfield == nil = \(self.view.subviews.contains(self.textField))\n")
self.isDrawing = false
if !self.view.subviews.contains(self.textField){
self.textFieldY = 80.0
self.textField = ForwardTextField(frame: CGRectMake(0.0, self.textFieldY, self.view.frame.size.width, 40.0))
self.textField.borderStyle = .None
self.textField.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.4)
//self.textField.alpha = 0.4;
self.textField.textColor = UIColor.whiteColor()
self.textField.returnKeyType = .Done
self.textField.delegate = self
//ADDED
//self.textField.userInteractionEnabled = true
self.textField.multipleTouchEnabled = false
self.textField.exclusiveTouch = false
self.textField.textAlignment = .Center
self.view.addSubview(self.textField)
print("Show Text BOx")
if self.textField.hidden == true {
self.textField.hidden = false
}
self.textField.becomeFirstResponder()
}else {
let touch: UITouch = touches.first!
//NSLog(@"touchesBegan");
let point: CGPoint = touch.locationInView(self.view)
if self.view.subviews.contains(self.textField) && CGRectContainsPoint(self.textField.frame, point) && !self.textField.hidden{
self.isMovingText = true
}
if self.isDrawing {
self.lastPoint = point
}
}
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
print("TOUCHES MOVED ")
print("ISMOVING TEXT = \(isMovingText)")
if self.isMovingText {
print("MOVESSSS")
let touch: UITouch = touches.first!
var point: CGPoint = touch.locationInView(self.view)
self.textFieldY = point.y
self.textField.frame = CGRectMake(0.0, point.y, self.textField.frame.size.width, self.textField.frame.size.height)
self.view.setNeedsDisplay()
}
if self.isDrawing {
//NSLog(@"touchmoved");
var touch: UITouch = touches.first!
var currentPoint: CGPoint = touch.locationInView(self.view)
self.image.drawAtPoint(CGPointMake(0.0, 0.0))
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), self.lastPoint.x, self.lastPoint.y)
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y)
CGContextSetLineCap(UIGraphicsGetCurrentContext(), .Round)
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), brush)
CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), self.drawColor.CGColor)
CGContextSetBlendMode(UIGraphicsGetCurrentContext(),.Normal)
CGContextStrokePath(UIGraphicsGetCurrentContext())
self.image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
self.lastPoint = currentPoint
self.view.setNeedsDisplay()
}
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
if self.isMovingText == true {
var touch: UITouch = touches.first!
var point: CGPoint = touch.locationInView(self.view)
self.textFieldY = point.y
self.textField.frame = CGRectMake(0.0, point.y, self.textField.frame.size.width, self.textField.frame.size.height)
self.view.setNeedsDisplay()
self.isMovingText = false
}
if self.isDrawing {
//NSLog(@"touchended");
self.image.drawAtPoint(CGPointMake(0.0, 0.0))
CGContextSetLineCap(UIGraphicsGetCurrentContext(),.Round)
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), brush)
CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), self.drawColor.CGColor)
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), self.lastPoint.x, self.lastPoint.y)
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), self.lastPoint.x, self.lastPoint.y)
CGContextStrokePath(UIGraphicsGetCurrentContext())
CGContextFlush(UIGraphicsGetCurrentContext())
self.image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
self.view.setNeedsDisplay()
}
}
While nothing is said in the docs about dragging UITextField 尽管在文档中没有任何有关拖动UITextField的内容
This seem like a bad idea (my opinion) as the purpose of a UITextField is to accept user text input, however, I did test successfully dragging a UIView with a UITextField inside the UIView with a UIView parent. 这似乎是个坏主意(我认为),因为UITextField的目的是接受用户文本输入,但是,我确实测试成功将带有UITextField的UIView拖动到带有UIView父级的UIView中。
I would delete all of the touches code from your UITextField. 我将从您的UITextField中删除所有的触摸代码。 Subclass the UIView and add a touchesMoved method to be overriding; 子类化UIView并添加要覆盖的touchesMoved方法; inside get the location and use that on the UIView.center. 在内部获取位置并在UIView.center上使用它。
Worked great for me. 对我来说很棒。 Tested both on swift 2.2 and 3. 在Swift 2.2和3。
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