iphone

问题 I am having a following problem. When a certain touch occures on a UIVIew, I want to store this UIView's unique identifier (like let's say objectID) so that when I reopen my app again I can check if in the visible UIViews there is the one UIView with the unique ID from the storage. I do not want to store the tag values as object ids because they may not be unique and they are manualy set up. I need to get a unique identifier that is automatically assign by the system. Any ideas hot to get it?

问题 when i'am using the AUGraph to realize playing sound from the mic, i have a problem, in the device(iphone 3g), i can only hear from the right side of the headset, but it is well in the simulator, i can hear from both of the side of the headset. here are the code i use to connect the input to the output: AUGraphConnectNodeInput(auGraph, remoteIONode, 1, remoteIONode, 0); someone help me? tks! 回答1: output is double channel, input is also double channel. i find that the data from mic is single

问题 when i'am using the AUGraph to realize playing sound from the mic, i have a problem, in the device(iphone 3g), i can only hear from the right side of the headset, but it is well in the simulator, i can hear from both of the side of the headset. here are the code i use to connect the input to the output: AUGraphConnectNodeInput(auGraph, remoteIONode, 1, remoteIONode, 0); someone help me? tks! 回答1: output is double channel, input is also double channel. i find that the data from mic is single

问题 I encountered a problem which made me unable to capture input signal from microphone on the device (iPhone4). However, the code runs fine in the simulator. The code was originally adopted from Apple's MixerHostAudio class from MixerHost sample code. it runs fine both on device and in simulator before I started adding code for capturing mic input. Wondering if somebody could help me out. Thanks in advance! Here is my inputRenderCallback function which feeds signal into mixer input: static

问题 I encountered a problem which made me unable to capture input signal from microphone on the device (iPhone4). However, the code runs fine in the simulator. The code was originally adopted from Apple's MixerHostAudio class from MixerHost sample code. it runs fine both on device and in simulator before I started adding code for capturing mic input. Wondering if somebody could help me out. Thanks in advance! Here is my inputRenderCallback function which feeds signal into mixer input: static

问题 (This question concerns HTML pages in Safari, not app development in XCode.) In Safari on iPhone, when clicking on a <input> or <textarea> , the text on the enter key says "enter". Is it possible to change this text? I remember a posting saying something about using <textarea title="My button text"> , but this does not work when I tried it. 回答1: Note. You get the return key and keyboard types defined in the OS. Unless you want to try to hack the keyboard's view hierarchy to change that button

问题 (This question concerns HTML pages in Safari, not app development in XCode.) In Safari on iPhone, when clicking on a <input> or <textarea> , the text on the enter key says "enter". Is it possible to change this text? I remember a posting saying something about using <textarea title="My button text"> , but this does not work when I tried it. 回答1: Note. You get the return key and keyboard types defined in the OS. Unless you want to try to hack the keyboard's view hierarchy to change that button

问题 (This question concerns HTML pages in Safari, not app development in XCode.) In Safari on iPhone, when clicking on a <input> or <textarea> , the text on the enter key says "enter". Is it possible to change this text? I remember a posting saying something about using <textarea title="My button text"> , but this does not work when I tried it. 回答1: Note. You get the return key and keyboard types defined in the OS. Unless you want to try to hack the keyboard's view hierarchy to change that button

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

问题 There are some measured results available for certain older ios devices but I'm not able to find FOV numbers for newer models, specifically, iPhone 5s ~ 6s Plus and iPad 4 ~ iPad Pro. Also, the numbers listed on the above link don't match with some other calculated results. I'm aware that FOV number can be read using the following API NSLog(@"Camera's FOV is %f",myCamera.activeFormat.videoFieldOfView); However, since I don't have all the models available at hand and the read numbers that are