ios5

问题 I am working on an iOS 5 app. I have a view controller that needs to display data as soon as its opened. The desired order of functionality is: Call a web service Wait for the reply from the web service (a delegate) Fill a data array Use the array to populate a list view Show the list view I have all of the components in place but after the web service call is made, the program doesn't wait for a reply (asynchronous call) and instead fills the list view with blanks since the data array is not

问题 My issue is I am using the table data source from the dictionary. This dictionary contains more than 20 elements in it. I need to search the element present in the dictionary and I need to scroll that element to a visible cell. My issue is I found the element, but it is out of the visible area. I need to scroll that to a visible area. How can I get the index? 回答1: Short answer? Nope. I know the feeling though, which lead me to... Longer answer? Yes-ish? My search a little while back brought

问题 I have a nice little app on the app store that does pretty well for itself. Life was great until iOS 5 came to town. Now, I have a number of issues with my app that I have no way of fixing because I have no clue what is going on, because I feel that they are iOS 5 issues, not mine. Was there an iOS 5 conversion manual I missed? Or did they just change everything for fun, and want us to figure out where all the easter eggs were? Here is an issue I am experiencing (that I have wasted so much

问题 I built my own custom video player (edit: find example code here) with AVMoviePlayerView.h #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @class AVPlayer; @interface AVMoviePlayerView : UIView @property (nonatomic) AVPlayer *player; - (void)setPlayer:(AVPlayer*)player; - (void)setVideoFillMode:(NSString *)fillMode; @end and AVMoviePlayerView.m #import "AVMoviePlayerView.h" #import <CoreMedia/CoreMedia.h> @implementation AVMoviePlayerView + (Class)layerClass { return

问题 I built my own custom video player (edit: find example code here) with AVMoviePlayerView.h #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @class AVPlayer; @interface AVMoviePlayerView : UIView @property (nonatomic) AVPlayer *player; - (void)setPlayer:(AVPlayer*)player; - (void)setVideoFillMode:(NSString *)fillMode; @end and AVMoviePlayerView.m #import "AVMoviePlayerView.h" #import <CoreMedia/CoreMedia.h> @implementation AVMoviePlayerView + (Class)layerClass { return

问题 I have a problem with MPMoviePlayerController, i.e. I am playing the live stream url in (m3u8 format) MPMoviePlayer like below: player = [[MPMoviePlayerController alloc] initWithContentURL:audioUrl]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadStateDidChange:) name:MPMoviePlayerLoadStateDidChangeNotification object:player]; if ([player respondsToSelector:@selector(loadState)]) { // Set movie player layout [player setMovieSourceType:MPMovieSourceTypeStreaming]

问题 I am trying to build libunwind on Mac for both iOS and Mac, I was able to resolve few of the compilation problem. Building on Mac I configured the project using ./configure CC="cc -Ae -D_XOPEN_SOURCE=500" And copied elf.h from google's breakpad project. https://google-breakpad.googlecode.com/svn-history/r1017/trunk/src/common/android/include/elf.h I get the following error now: /usr/include/elf.h:58:15: fatal error: 'elf.h' file not found #include_next <elf.h> Can anybody help me in solving

问题 This used to work in iOS 5 but does not seem to work any longer: unsigned freq; mib[0] = CTL_HW; mib[1] = HW_CPU_FREQ; sysctl (mib, 2, &freq, (void*) &len, NULL, 0); Does anybody know an alternative? Thanks. 回答1: Apple doesn't provide the CPU frequency for all hardware. For example, it was unknown for some time exactly what the clock rate for the A4 in the iPod touch 4g was. I think the best you can do is determine what the device is, and construct a lookup table with the CPU frequencies you

问题 I have two tasks that i need to perform in background simultaneously with different thread priorities: continuously gather and process gyro motion data (high priority) gyroQueue = [[NSOperationQueue alloc] init]; [self.motionManager startDeviceMotionUpdatesToQueue:gyroQueue withHandler:^(CMDeviceMotion *motion, NSError *error){ [self processMotion:motion withError:error]; }]; Sometimes process images without interfering with motion updates (convert, crop, sesize, etc = 1-2sec) (very low

问题 My method: +(SecKeyRef)getKeyByTagWithoutAlert:(NSString *)keyTag status:(OSStatus *) status{ *status = noErr; SecKeyRef key = NULL; NSMutableDictionary *queryKey = [[NSMutableDictionary alloc] init]; // Set the key query dictionary. [queryKey setObject:(id)kSecClassKey forKey:(id)kSecClass]; [queryKey setObject:[SecKeyUtility getDataByTag:keyTag] forKey:(id)kSecAttrApplicationTag]; [queryKey setObject:(id)kSecAttrKeyTypeRSA forKey:(id)kSecAttrKeyType]; [queryKey setObject:[NSNumber