cocoa-touch

问题 My Question is how can i find minimum and maximum latitude and longitude of specific area (500 meter) from current location. In my case, Such like i need to get X and Y CLLocation (latitude and longitude) from 500 meter of area See my image (sorry for this may be bad drawing ) I also have to tried to googling and i got link such like How can i get minimum and maximum latitude and longitude using current location and radius? But i don't know how it implement in my case. Pleas help me in this

问题 My Question is how can i find minimum and maximum latitude and longitude of specific area (500 meter) from current location. In my case, Such like i need to get X and Y CLLocation (latitude and longitude) from 500 meter of area See my image (sorry for this may be bad drawing ) I also have to tried to googling and i got link such like How can i get minimum and maximum latitude and longitude using current location and radius? But i don't know how it implement in my case. Pleas help me in this

问题 My Question is how can i find minimum and maximum latitude and longitude of specific area (500 meter) from current location. In my case, Such like i need to get X and Y CLLocation (latitude and longitude) from 500 meter of area See my image (sorry for this may be bad drawing ) I also have to tried to googling and i got link such like How can i get minimum and maximum latitude and longitude using current location and radius? But i don't know how it implement in my case. Pleas help me in this

问题 I have got two audio tracks on me that I combine with one another like this: AVMutableComposition *composition = [[AVMutableComposition alloc] init]; AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [compositionAudioTrack setPreferredVolume:1.0]; AVAsset *avAsset = [AVURLAsset URLAssetWithURL:originalContentURL options:nil]; AVAssetTrack *clipAudioTrack = [[avAsset tracksWithMediaType

问题 I have got two audio tracks on me that I combine with one another like this: AVMutableComposition *composition = [[AVMutableComposition alloc] init]; AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [compositionAudioTrack setPreferredVolume:1.0]; AVAsset *avAsset = [AVURLAsset URLAssetWithURL:originalContentURL options:nil]; AVAssetTrack *clipAudioTrack = [[avAsset tracksWithMediaType

问题 I have got two audio tracks on me that I combine with one another like this: AVMutableComposition *composition = [[AVMutableComposition alloc] init]; AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [compositionAudioTrack setPreferredVolume:1.0]; AVAsset *avAsset = [AVURLAsset URLAssetWithURL:originalContentURL options:nil]; AVAssetTrack *clipAudioTrack = [[avAsset tracksWithMediaType

问题 The issue I have is quite clear. This year, the 28th to 31st of december 2014 fall to 53rd week of 2014. For some reason, NSCalendar is generating the wrong value when I extract the components from the date. Why? Am I missing something? NSDateComponents *mockTodayComponents = [[NSDateComponents alloc] init]; mockTodayComponents.day = 27; mockTodayComponents.month = 12; mockTodayComponents.year = 2014; NSDate *mockToday = [[NSCalendar currentCalendar] dateFromComponents:mockTodayComponents]; /

问题 I set three buttons. Every button is tagged 1...3. My UITapGestureRecognizer works only once and only for first UIButton. Can't select other two options. Code: - (void)viewDidLoad { [super viewDidLoad]; UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(buttonTapped:)]; recognizer.delegate = self; recognizer.cancelsTouchesInView = NO; [recognizer setNumberOfTapsRequired:1]; [_btnNegative addGestureRecognizer:recognizer]; [_btnNeutral

问题 I set three buttons. Every button is tagged 1...3. My UITapGestureRecognizer works only once and only for first UIButton. Can't select other two options. Code: - (void)viewDidLoad { [super viewDidLoad]; UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(buttonTapped:)]; recognizer.delegate = self; recognizer.cancelsTouchesInView = NO; [recognizer setNumberOfTapsRequired:1]; [_btnNegative addGestureRecognizer:recognizer]; [_btnNeutral

问题 Is it possible to run some javascript code (having perhaps an NSString as input) without using a UIWebView ? I would like to run this code in a separate thread so UIWebView is not possible and I don't really want to render anything, just get back the results. 回答1: I have not tried this, but here is one idea: Write code to allocate an empty UIWebView but doesn't add it as a subview anywhere, and just directly call - (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script on your