I'm trying to capture fullscreen video, but first of all wanna capture some simple view. Get image from UIView and produce below view. Here is my code:
- (void)viewDidLoad {
[super viewDidLoad];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
label.text = #"fds";
[self.view addSubview:label];
handleUiElem = [[GPUImageUIElement alloc] initWithView:label];
CGRect frame = label.frame;
frame.origin.y += 100;
outView = [[GPUImageView alloc] initWithFrame:frame];
outView.backgroundColor = [UIColor redColor];
[self.view addSubview:outView];
[handleUiElem addTarget:outView];
[[NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:#selector(update:) userInfo:nil repeats:YES] fire];
}
- (void)update:(id)timer
{
[handleUiElem updateUsingCurrentTime];
}
But as are result I get black view instead of text in label. What I'm doing wrong?
Related
I'm getting a "weird" animation glitch when I add a UIToolbar to the view. I'm animating the UIToolbar so it slides up from the bottom together with either a UIPickerView or a UIDatePicker. At first I see it's sliding up but after the animation is finished it quickly disappears. This happens when I slide down (animating the UIPickerView to slide down off the screen) and right after that I have another UIPickerView slide up.
I noticed that if I set a delay (- performSelector...) on the slide up call for 0.3 seconds it will display the UIToolbar properly (anything less than 0.3 seconds will still have the same glitch). What might be causing this?
EDIT: Perhaps I should place both the UIToolbar and UIDatePicker in a new UIView container?
This is the code I'm using:
if ([self.view.subviews containsObject:self.dateRepeatPicker]) {
[self dismissDateRepeatPickerSegmentChanged:NO];
// "Hack", if I don't delay this call the UIToolbar will not display
[self performSelector:#selector(showDatePicker) withObject:nil afterDelay:0.3];
} else if (![self.view.subviews containsObject:self.datePicker]) {
[self showDatePicker];
}
- (void)dismissDateRepeatPickerSegmentChanged:(BOOL)segmentChanged {
CGRect toolbarTargetFrame = CGRectMake(0, self.view.bounds.size.height, 320, 44);
CGRect dateRepeatPickerTargetFrame = CGRectMake(0, self.view.bounds.size.height+44, 320, 216);
[UIView animateWithDuration:0.2
animations:^{
self.pickerToolbar.frame = toolbarTargetFrame;
self.dateRepeatPicker.frame = dateRepeatPickerTargetFrame;
}
completion:^(BOOL finished) {
if (segmentChanged) {
[self.pickerToolbar removeFromSuperview];
[self.dateRepeatPicker removeFromSuperview];
[self.remindMeTableView reloadData];
} else {
[self.pickerToolbar removeFromSuperview];
[self.dateRepeatPicker removeFromSuperview];
}
}];
}
- (void)showDatePicker {
// Create the Toolbar over the Picker
CGRect toolbarTargetFrame = CGRectMake(0, self.view.bounds.size.height-216-44, 320, 44);
if (self.pickerToolbar == nil) {
self.pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height, 320, 44)];
self.pickerToolbar.barStyle = UIBarStyleBlack;
self.pickerToolbar.translucent = YES;
}
UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"picker-dismiss.png"] style:UIBarButtonItemStyleBordered target:self action:#selector(dismissDatePickerToolbar)];
[self.pickerToolbar setItems:[NSArray arrayWithObjects:spacer, doneButton, nil]];
[self.view addSubview:self.pickerToolbar];
// Create the Picker under the Toolbar
CGRect datePickerTargetFrame = CGRectMake(0, self.view.bounds.size.height-216, 320, 216);
if (self.datePicker == nil) {
self.datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height+44, 320, 216)];
[self.datePicker setMinuteInterval:5];
[self.datePicker addTarget:self action:#selector(changeDate:) forControlEvents:UIControlEventValueChanged];
}
[self.view addSubview:self.datePicker];
[UIView animateWithDuration:0.2 animations:^{
self.pickerToolbar.frame = toolbarTargetFrame;
self.datePicker.frame = datePickerTargetFrame;
}];
}
Solved by adding the UIPickerView and the UIToolbar to a containing UIView and then animating the containing UIView.
i'd like to prevent scrolling on the 3rd page of my UIScrollview and "hijack the swipe" gesture to trigger sth. else. Afer this action I'd like to reactive scrolling.
This does not work.
- (void)scrollViewDidScroll:(UIScrollView *)sender
{
if(scrollView.contentOffset.x == self.view.frame.size.width * 2 ) {
// disable scrolling
scrollView.scrollEnabled = NO;
}
}
// hijack the next scrolling event
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
This delegate is not called when scrollEnabled = NO
Thanks for helping
EDIT EventHandler ist not called ;-(
- (void)viewDidLoad
{
[super viewDidLoad];
// Default background color
self.view.backgroundColor = [UIColor redColor];
// Create scroll view
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
scrollView.pagingEnabled = YES;
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = NO;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeFrom:)];
recognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[scrollView addGestureRecognizer:recognizer];
[recognizer release];
[scrollView delaysContentTouches];
// Create subviews (pages)
NSInteger numberOfViews = 4;
for (int i = 0; i < numberOfViews; i++) {
// x pos
CGFloat yOrigin = i * self.view.frame.size.width;
// Create subview and add to scrollView
UIView *pageView = [[UIView alloc] initWithFrame:CGRectMake(yOrigin, 0, self.view.frame.size.width, self.view.frame.size.height)];
pageView.backgroundColor = [UIColor colorWithRed:0.5/i green:0.5 blue:0.5 alpha:1];
[scrollView addSubview:pageView];
[pageView release];
}
// Set contentsize
scrollView.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height);
// Add scrollView to view and release
[self.view addSubview:scrollView];
[scrollView release];
}
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer {
NSLog(#"swipe!!!!");
scrollView.scrollEnabled = YES;
}
If you disable the scroll view:
scrollView.scrollEnabled = NO;
it is unavoidable that the delegate method is not called, so you need an alternative way to handle the swipe while in hijack mode. One thing you could try is using an UISwipeGestureRecognizer: instead of simply disabling scrolling, you could associate a UISwipeGestureRecognizer to you view and handle the swipe from the handler method:
UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeFrom:)];
recognizer.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:recognizer];
and in handleSwipeFrom you would reenable scrolling:
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer {
// do your hijack here
scrollView.scrollEnabled = YES;
}
I am trying to add uipickerview in uiscrollview, but it is not being shown properly, just a black square.
Further, I have to add 1 more uipickerview, some labels and some buttons.
The code I am using is as under:
-(void)loadView {
[super loadView];
UIPickerView *pView = [[UIPickerView alloc] initWithFrame:CGRectMake(20, 20, 280, 165)];
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"Background.png"]];
scroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
scroller.pagingEnabled = YES;
NSInteger numberOfViews = 2;
for (int i = 0; i < numberOfViews; i++) {
CGFloat yOrigin = i * self.view.frame.size.height;
UIView *awesomeView = [[UIView alloc] initWithFrame:CGRectMake(yOrigin, 0, self.view.frame.size.width, self.view.frame.size.height)];
// awesomeView.backgroundColor = [UIColor colorWithRed:0.5/i green:0.5 blue:0.5 alpha:1];
[scroller addSubview:awesomeView];
[scroller addSubview:pView];
}
scroller.contentSize = CGSizeMake(self.view.frame.size.width , self.view.frame.size.height * numberOfViews);
[self.view addSubview:scroller];
}
what can be the issue?
Are you putting data in the picker view? I mean, if you just put the picker view without data on it you are not going to see anything on it.
You need to add the delegate and the datasource and put some data in your picker!
pView.delegate = self;
pView.datasource = self;
and then you have to implemente at least:
numberOfComponentsInPickerView:
numberOfRowsInComponent:
titleForRow:
make sure you are implementing uipickerviewdelegate methods. its normal that it will show just the black square because your pickerview cant find the data and thus does not display anything.
UIPickerView *pView = [[UIPickerView alloc] initWithFrame:CGRectMake(20, 20, 280, 165)];
Change height to 216 .. UIPickerView has fixed height of 216 ..only.. you can't change it..
I've found a lot of information on autoresizing but none has been able to solve my problem. I have a ViewController (RAViewController) who calls a view in its loadView method like so:
- (void)loadView
{
// Set Navigation Bar Title
self.navigationItem.title = #"RA";
// Add Background view
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Add RAView
RAView *rAView = [[RAView alloc] initWithFrame:self.view.frame Controller:self];
[self.view rAView];
}
The view it calls (RAView) looks like this:
- (id)initWithFrame:(CGRect)frame Controller:(RAViewController *)Controller
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
self.autoresizesSubviews = YES;
self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.backgroundColor = [[UIColor alloc] initWithRed:1.0 green:1.0 blue:1.0 alpha:1.0];
controller = Controller;
// Draw Architecture View
[self drawArchitectureView];
}
return self;
}
-(void)drawArchitectureView {
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10, 10, self.frame.size.width - 20, 50);
[button setBackgroundColor:[UIColor grayColor]];
[button setTitle:#"Overview" forState:UIControlStateNormal];
[self addSubview:button];
}
For some reason I can't get autoresizing mask to resize the button width when the device is landscape. Any help is greatly appreciated.
If you want it to keep the same height, but just stay fully centered, 10.0 from the left and right, try:
-(void)drawArchitectureView {
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10, 10, self.frame.size.width - 20, 50);
button.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleRightMargin;
[button setBackgroundColor:[UIColor grayColor]];
[button setTitle:#"Overview" forState:UIControlStateNormal];
[self addSubview:button];
}
Running into a problem when I try and add a UILabel to a custom UITableViewCell. For some reason the frame's are not being respected at all - when I try and set the label height (through CGRectMake) the text is being cropped vertically. In other words, only half of the text is being shown.
When I play around with the CGRectMake's frame height it shows some strange behavior - sometimes a lower value will actually make things align properly.
Am I setting the wrong values? Is the frame the wrong property to be modifying?
Edit for code:
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {
// Initialization code
eventName = [[UILabel alloc] initWithFrame:CGRectZero];
//eventName.backgroundColor = [UIColor blueColor];
eventName.numberOfLines = 2;
eventName.minimumFontSize = 8.;
eventName.adjustsFontSizeToFitWidth = YES;
eventName.text = #"Event Name";
[self.contentView addSubview:eventName];
eventStartEndDate = [[UILabel alloc] initWithFrame:CGRectZero];
eventStartEndDate.backgroundColor = [UIColor blueColor];
eventStartEndDate.text = #"Event Start and End Dates";
[self.contentView addSubview:eventStartEndDate];
description = [[UILabel alloc] initWithFrame:CGRectMake(10.0, 30.0, 300.0, 20.0)];
[self.contentView addSubview:description];
}
return self;
}
-(void)layoutSubviews
{
[super layoutSubviews];
if (!self.editing) {
eventName.frame = CGRectMake(10.0, 10.0, 300.0, 20.0);
eventStartEndDate.frame = CGRectMake(10.0, 35.0, 300.0, 20.0);;
}
}
First of all, you should pay more attention to memory management. You have to call release on your UILabels.
The reason, why your UILabels sometimes seem clipped is, because your other labels do have a white, opaque background. Setting the backgroundColor property to [UIColor clearColor] does the trick.
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
eventName = [[UILabel alloc] initWithFrame:CGRectZero];
//eventName.backgroundColor = [UIColor blueColor];
eventName.numberOfLines = 2;
eventName.minimumFontSize = 8.;
eventName.adjustsFontSizeToFitWidth = YES;
eventName.text = #"Event Name";
eventName.backgroundColor = [UIColor clearColor];
[self.contentView addSubview:eventName];
[eventName release];
eventStartEndDate = [[UILabel alloc] initWithFrame:CGRectZero];
eventStartEndDate.backgroundColor = [UIColor blueColor];
eventStartEndDate.text = #"Event Start and End Dates";
[self.contentView addSubview:eventStartEndDate];
[eventStartEndDate release];
description = [[UILabel alloc] initWithFrame:CGRectMake(10.0, 30.0, 300.0, 20.0)];
description.backgroundColor = [UIColor clearColor];
[self.contentView addSubview:description];
[description release];
}
return self;
}