我有一個UIView,帶有子視圖(lastView
)的UISCrollView的子視圖。我想要的是當我長時間按下視圖時,它將刪除lastView
。然後再次長按lastView
將再次出現。我試過了,但我只有這麼遠。我的lastView
沒有出現,我的long press gesture
也沒有工作。長按手勢和子視圖不工作
這裏是我的代碼:
- (void)handleLongPress:(UILongPressGestureRecognizer*)sender {
if (sender.state == UIGestureRecognizerStateEnded) {
[self.slotView removeFromSuperview];
NSLog(@"Long press Ended");
}
else {
NSLog(@"Long press detected.");
}
}
- (void) createScrollView {
self.slotBg = [[UIView alloc] initWithFrame:CGRectMake(43, 370, 300, 143)];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = self.slotBg.bounds;
gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor grayColor] CGColor], (id)[[UIColor whiteColor] CGColor], nil];
[self.slotBg.layer insertSublayer:gradient atIndex:0];
[self.view addSubview:self.slotBg];
UILongPressGestureRecognizer *longPress =
[[UILongPressGestureRecognizer alloc] initWithTarget:self
action:@selector(handleLongPress:)];
longPress.minimumPressDuration = 2.0;
[slotBg addGestureRecognizer:longPress];
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0f,0.0f,300.0f,134.0f)];
[slotBg addSubview:scrollView];
self.slotView = [[UIView alloc] initWithFrame:CGRectMake(0.0f,0.0f,300.0f,134.0f)];
[scrollView addSubview:slotView];
int row = 0;
int column = 0;
for(int i = 0; i < _thumbs.count; ++i) {
UIImage *thumb = [_thumbs objectAtIndex:i];
UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(column*60+10, row*60+10, 60, 60);
[button setImage:thumb forState:UIControlStateNormal];
[button addTarget:self
action:@selector(buttonClicked:)
forControlEvents:UIControlEventTouchUpInside];
button.tag = i;
[scrollView addSubview:button];
if (column == 4) {
column = 0;
row++;
} else {
column++;
}
}
[scrollView setContentSize:CGSizeMake(330, (row+1) * 60 + 10)];
}