erstellen panRecognizer
UIPanGestureRecognizer *panRecognizer;
panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self
action:@selector(wasDragged:)];
[[self subview] addGestureRecognizer:panRecognizer];
2.Create wasDragged Methode
- (void)wasDragged:(UIPanGestureRecognizer *)recognizer {
CGPoint translation = [recognizer translationInView:self.view];
CGRect recognizerFrame = recognizer.view.frame;
recognizerFrame.origin.x += translation.x;
// Check if UIImageView is completely inside its superView
if (CGRectContainsRect(self.view.bounds, recognizerFrame)) {
recognizer.view.frame = recognizerFrame;
}
// Else check if UIImageView is vertically and/or horizontally outside of its
// superView. If yes, then set UImageView's frame accordingly.
// This is required so that when user pans rapidly then it provides smooth translation.
else {
// Check vertically
if (recognizerFrame.origin.y < self.view.bounds.origin.y) {
recognizerFrame.origin.y = 0;
}
else if (recognizerFrame.origin.y + recognizerFrame.size.height > self.view.bounds.size.height) {
recognizerFrame.origin.y = self.view.bounds.size.height - recognizerFrame.size.height;
}
// Check horizantally
if (recognizerFrame.origin.x < self.view.bounds.origin.x) {
recognizerFrame.origin.x = 0;
}
else if (recognizerFrame.origin.x + recognizerFrame.size.width > self.view.bounds.size.width) {
recognizerFrame.origin.x = self.view.bounds.size.width - recognizerFrame.size.width;
}
}
// Reset translation so that on next pan recognition
// we get correct translation value
[recognizer setTranslation:CGPointZero inView:self.view];
}
Sie nicht meine Nummer, ich möchte einen kleinen ui Blick haben, die rollbaren sein kann aber nur nach links und rechts. und wenn der Benutzer nach unten scrollt, möchte ich unter der oberen Leiste bleiben, ich möchte nicht, dass er sich von seinem Platz bewegt –