ios8

问题 Simple question. How do I play multi channel audio files (>2 channels) using AVAudioEngine so that I can hear all channels on default 2-channel output (headphones/speaker). Following code (stripped of error checking for presenting) plays the file first two channels but I can only hear it when headphones are plugged in. AVAudioFile *file = [[AVAudioFile alloc] initForReading:[[NSBundle mainBundle] URLForResource:@"nums6ch" withExtension:@"wav"] error:nil]; AVAudioEngine *engine = [

问题 Here's how I set my table: self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds]; self.tableView.delegate = self; self.tableView.dataSource = self; self.tableView.estimatedRowHeight = 150; [self.view addSubview:self.tableView]; Within my cells, I call - (CGSize)sizeThatFits:(CGSize)size to programmatically return the height (which is set in - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath . I'm not using constraints or

问题 I had the following code that worked perfectly in iOS7. [UIView animateWithDuration:0.5 animations:^(void) { self.view.alpha = 0.5; [self.navigationController.navigationBar setAlpha:0.3]; }]; //to make the background view controller semi-transparent UIViewController *rootViewController = [UIApplication sharedApplication].delegate.window.rootViewController; [rootViewController setModalPresentationStyle:UIModalPresentationCurrentContext]; OverlayViewController *ctlr = [storyBoard

问题 I want to create popup in iOS8 custom keyboard as shown below image. Some code are working but can't access outer window of keyboard and occures issue as shown in below image-2 回答1: This what i have done in my custom Keyboard its working //adding pop up when character is tapped - (void)addPopupToButton:(UIButton *)button { CGRect frame,frame1; if(self.view.frame.size.width == 320) { //Keyboard is in Portrait frame = CGRectMake(0, -25, 28, 43); frame1=CGRectMake(0, 0, 28, 43); } else{ /

问题 Apple documentation suggests setting the height of Today Extensions using autolayout. If a widget has additional content to display, you can rely on Auto Layout constraints to adjust the widget’s height as appropriate. If you don’t use Auto Layout, you can use the UIViewController property preferredContentSize to specify the widget’s new height. However, every example and tutorial I have seen ends up using preferredContentSize . All of my attempts to set the height via autolayout lead to

问题 I try to underline part of a string, for example, a ' string ' part in ' test string ' string. I'm using NSMutableAttributedString and my solution was working well on iOS7 . NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"test string"]; [attributedString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:NSMakeRange(5, 6)]; myLabel.attributedText = attributedString; The problem is that my solution is not working

问题 I used to have a "Please wait" dialog in my app for long time. It was quite simple thing using UIActivityIndicatorView and adding it to UIAlertView . However iOS8 introduced UIAlertController . Is it possible to add anything to it to have similiar effect? Is there another way of doing such thing with iOS8? I have searched a lot of sites and still have no idea how it can be done with the new API. I would appreciate any answers - links to libs, tutorials etc., which could be helpful. Regards,

问题 I have an iOS7 application, which was based on the Xcode master-detail template, that I am porting to iOS8. One area that has changed a lot is the UISplitViewController . When in portrait mode, if the user taps on the detail view controller, the master view controller is dismissed: I would also like to be able to programmatically hide the master view controller if the user taps on a row. In iOS 7, the master view controller was displayed as a pop-over, and could be hidden as follows: [self

问题 When I make any iOS 8 Today Extension, there is an empty space on the left of approximately 48px, even if in Interface Builder I place a label on the left side at x=0. I have seen that some apps, however, use a full-width widget. How can I achieve something similar? Thanks! UPDATE: SOLVED I put here the sample code because I guess it will be useful to someone. As suggested by @matteo-lallone, the correct way to do this is: -(UIEdgeInsets)widgetMarginInsetsForProposedMarginInsets:(UIEdgeInsets

问题 Long time lurker - first time poster! I am having an issue while recreating a bar with a UITextView like WhatsApp does it. I am using a custom UIView subclass, and lazily instantiating it on: - (UIView *)inputAccessoryView and returning YES on: - (BOOL)canBecomeFirstResponder Now, I want to change the size of the inputAccessoryView when the UITextView grows in size. On iOS 7, I would simply change the size of the frame of said view - and not it's origin -, and then call reloadInputViews and