[英]need UIButton inside custom UIView respond to touches
我有一些按鈕作為子視圖的自定義UIView。 我正在使用touchesBegan / Moved / Ended來用用戶的手指旋轉視圖。 問題是,當我嘗試從按鈕拖動/旋轉視圖時,不會調用touches
方法。 我需要按鈕來響應UIControlEventTouchUpInside
事件,但是如果將其與視圖一起拖動,則使視圖旋轉。 我已經看過這個問題和這個問題,但是找不到任何一種對我有用的解決方案。
這是我的自定義視圖代碼:
- (id)initWithFrame:(CGRect)frame andRadius:(float)Radius andViews:
(NSMutableArray *)AllViews
{
self = [super initWithFrame:frame];
if (self) {
radius = Radius;
allViews = AllViews;
for(int i = 0; i < [allViews count]; i++){
//the "currentView" is a UIButton
UIView *currentView = (UIView *)[allViews objectAtIndex:i];
[currentView setFrame:CGRectMake(frame.size.width / 2 - 25 + radius * cos((2 * M_PI / [allViews count]) * i), frame.size.height / 2 - 25 + radius * sin((2 * M_PI / [allViews count]) * i), 50, 50)];
[self addSubview:currentView];
}
[self setBackgroundColor:[UIColor redColor]];
[self setAlpha:.5];
}
return self;
}
//- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
//{
// for (UIView * view in [self subviews]) {
// if ([view pointInside:[self convertPoint:point toView:view] withEvent:event]) {
// return YES;
// }
// }
// return NO;
//}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
x = point.x;
y = point.y;
NSLog(@"touchesBegan");
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
float X = point.x;
float Y = point.y;
float a = sqrt(X * X + Y * Y);
float b = sqrt(x * x + y * y);
float c = sqrt((x - X) * (x - X) + (y - Y) * (y - Y));
float alpha = acos((a * a + b * b - (c * c)) / (2 * a * b));
if(alpha == NAN)
alpha = 0;
alpha = -alpha;
[UIView beginAnimations:@"rotate" context:nil];
[UIView setAnimationDuration:0];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
self.transform = CGAffineTransformRotate(self.transform, alpha);
[UIView commitAnimations];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
float X = point.x;
float Y = point.y;
float a = sqrt(X * X + Y * Y);
float b = sqrt(x * x + y * y);
float c = sqrt((x - X) * (x - X) + (y - Y) * (y - Y));
float alpha = acos((a * a + b * b - (c * c)) / (2 * a * b));
alpha = -alpha;
[UIView beginAnimations:@"rotate" context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
self.transform = CGAffineTransformRotate(self.transform, alpha);
[UIView commitAnimations];
NSLog(@"touchesEnded");
}
- (void)dealloc
{
[allViews release];
[super dealloc];
}
有什么建議么?
也許不是您要找的答案,但是:
我不確定為什么要通過拖動后的視圖將“手指按下按鈕然后將手指拖動到按鈕外部”活動作為拖動/旋轉動作。 就我而言,如果您將手指放在按鈕內,則表示您正在與按鈕交互,而不是背后的視圖; 並且如果您仍在觸摸屏幕的同時將手指從按鈕上移開,則是為了中止按鈕的按下(即您已經“武裝”了它,但沒有“觸發”它),而不與后面的視圖進行交互。
所以我要說的是:您為什么要這樣做? 也許您需要重新考慮您的UI設計。
如果您絕對想這樣做,則可以考慮使用UIGestureRecognizer
而不是touchesBegan
等touchesBegan
使用它們時,您可以更輕松地設置更復雜的場景。 但是手勢識別器並非在所有版本的iOS上都可用。
或者,實現看起來像按鈕的東西或您想要的任何東西,並使用touchesBegan等方法處理它的觸摸(以及視圖拖動等)-即,不要使用實際的按鈕。
萬一有人遇到類似問題,我將發布我使用的解決方案。 我覆蓋了另一個用作按鈕的UIView
類。 在每個touchedBegan/Moved/Ended
,我實現了單擊按鈕所需的代碼,然后將觸摸命令鏈傳遞給下一個自定義UIView
,如下所示:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.nextResponder touchesBegan:touches withEvent:event];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.nextResponder touchesMoved:touches withEvent:event];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
if (point.x < self.frame.size.width && point.y < self.frame.size.height) {
NSDictionary *userInfo = [[NSDictionary alloc] initWithObjectsAndKeys:[NSString stringWithFormat:@"%d", self.tag], @"tag", nil];
[[NSNotificationCenter defaultCenter] postNotificationName:@"ChangeFilter" object:self userInfo:userInfo];
}
[self.nextResponder touchesEnded:touches withEvent:event];
}
請注意,我使用NSNotifications將操作發送到包含重寫視圖的ViewController
。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.