- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
touchStart = [[touches anyObject] locationInView:self];
isResizingLR = (self.bounds.size.width - touchStart.x < kResizeThumbSize && self.bounds.size.height - touchStart.y < kResizeThumbSize);
isResizingUL = (touchStart.x <kResizeThumbSize && touchStart.y <kResizeThumbSize);
isResizingUR = (self.bounds.size.width-touchStart.x < kResizeThumbSize && touchStart.y<kResizeThumbSize);
isResizingLL = (touchStart.x <kResizeThumbSize && self.bounds.size.height -touchStart.y <kResizeThumbSize);
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
CGPoint touchPoint = [[touches anyObject] locationInView:self];
CGPoint previous=[[touches anyObject]previousLocationInView:self];
float deltaWidth = touchPoint.x-previous.x;
float deltaHeight = touchPoint.y-previous.y;
if (isResizingLR) {
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y,touchPoint.x + deltaWidth, touchPoint.y + deltaWidth);
}
if (isResizingUL) {
self.frame = CGRectMake(self.frame.origin.x + deltaWidth, self.frame.origin.y + deltaHeight, self.frame.size.width - deltaWidth, self.frame.size.height - deltaHeight);
}
if (isResizingUR) {
self.frame = CGRectMake(self.frame.origin.x ,self.frame.origin.y + deltaHeight, self.frame.size.width + deltaWidth, self.frame.size.height - deltaHeight);
}
if (isResizingLL) {
self.frame = CGRectMake(self.frame.origin.x + deltaWidth ,self.frame.origin.y , self.frame.size.width - deltaWidth, self.frame.size.height + deltaHeight);
}
if (!isResizingUL && !isResizingLR && !isResizingUR && !isResizingLL) {
self.center = CGPointMake(self.center.x + touchPoint.x - touchStart.x,self.center.y + touchPoint.y - touchStart.y);
}
}
我也嘗試過這種方法,但這種方法還存在另一個問題。當我添加子視圖(比如說)resizableView並嘗試用'gripview'調整大小時,所有的子視圖都搞砸了。 使用'gripView'調整大小之前和之後的示例 http://imageshack.us/photo/my-images/29/beforey.png/ http://imageshack.us/photo/my-images/560/afterv。 png/ – WezUwiUsz 2011-05-12 12:42:17
我並沒有想象手柄視圖和其他視圖之間的子視圖關係。我會讓他們有相同的父母,只是更新手勢識別器中的兩個中心和大小。 – 2011-05-12 13:12:49