ios7

问题 Hello I Understand TTS is only available in iOS 7 but i used many apis in the past by checking if the class is available and managed to retain compatibility on previous versions but with AVSpeechSynthesizer it doesn't seem to work, can you please help me use TTS for iOS 7 and retain compatibility by disabling it in iOS 6, thank you very much. Here is my code but it doesn't seem to work if (([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)) { if([AVSpeechSynthesizer class]) {

问题 Hello I Understand TTS is only available in iOS 7 but i used many apis in the past by checking if the class is available and managed to retain compatibility on previous versions but with AVSpeechSynthesizer it doesn't seem to work, can you please help me use TTS for iOS 7 and retain compatibility by disabling it in iOS 6, thank you very much. Here is my code but it doesn't seem to work if (([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)) { if([AVSpeechSynthesizer class]) {

问题 In iOS 6 I used this code to get the number of lines in the UITextView : int numLines = textView.contentSize.height / textView.font.lineHeight; But this is not working in iOS 7. How do I get the total number of lines of the UITextView in iOS 7? 回答1: You can use something like this. It's low performance but this is what I could figure till now. NSString *string=textView3.text; NSArray *array=[string componentsSeparatedByString:@"\n"]; NSLog(@"%d",array.count); 回答2: You can do this with the

问题 I've create simple module where I add subview to UIWindow. In simulator ios 7(Xcode 5.1.1) I have printed self.windows and I get: <UIWindow: 0x8db1670; frame = (0 0; 768 1024); autoresize = W+H; gestureRecognizers = <NSArray: 0x8db1a70>; layer = <UIWindowLayer: 0x8db17d0>> but on ios8 (Xcode 6 beta 6) I get: <UIWindow: 0x794320d0; frame = (0 0; 1024 768); gestureRecognizers = <NSArray: 0x79437a80>; layer = <UIWindowLayer: 0x7943c400>> The question is: why there is a difference in frame

问题 Check mark represents the selected row at that time, left image is of iOS7 simulator and right is of iOS6 simulator. The concern is UITableViewCellAccessoryDetailDisclosureButton in iOS7 has two parts, one part with right arrow accessory and other is the clickable "i" button rather than iOS6. Is it a standard behaviour or am I doing something wrong, if it is standard then what should be the correct way of handling UITableViewCellAccessoryDetailDisclosureButton in iOS7? 回答1: mahboudz is

问题 Going through my iOS6 app and trying to fix everything for iOS7. Throughout my app I'm getting the error: -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0] Here is the stack trace from this code: NSString *shareString = [NSString stringWithFormat:@"I ... %@", self.booking.venue.name]; NSArray *activityItems = [NSArray arrayWithObjects:shareString, nil]; UIActivityViewController *activityViewController = [[UIActivityViewController alloc]

问题 What is the official method to detect mobile safari on ios7? For example: navigator.userAgent.match(/(iPod|iPhone|iPad)/) && navigator.userAgent.match(/AppleWebKit/) && navigator.userAgent.match(/OS 7/) 回答1: Try this (to detect iPod touch as well): navigator.userAgent.match(/(iPad|iPhone|iPod touch);.*CPU.*OS 7_\d/i) 回答2: Try this navigator.userAgent.match(/(iPad|iPhone);.*CPU.*OS 7_\d/i) 回答3: /iP(ad|hone|od)/.test(navigator.userAgent) Gives simple T/F. 来源： https://stackoverflow.com/questions

问题 I am trying to set the background image for back button in normal and highlighted states. - (void)configureBackButtonInNavigationItem:(UINavigationItem *)item { UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:nil action:NULL]; [backBarButtonItem setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]} forState:UIControlStateNormal]; [backBarButtonItem setTitleTextAttributes:@

问题 I am having an interesting, yet strange issue with my game timer. It seems like the milliseconds works just fine. However, when I try to apply the std::chrono::seconds cast I suddenly get 0.000000 when casting to a float. My timer is as follows: #include <iostream> #include <time.h> #include <chrono> class Timer { public: typedef std::chrono::high_resolution_clock Time; typedef std::chrono::milliseconds ms; //<--If changed to seconds, I get 0.00000 typedef std::chrono::duration<float> fsec;

问题 I would like the UITableView 's row height to respond to changes in the user's preferred text size. For example, when the preferred text size increases, I would like to increase the row height by a proportional amount. Here's what I have so far: - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; [self.tableView reloadData]; // observe when user changes preferred text size [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector