iphone

问题 How can I add a button to a UIPickerView? Thanks. The result should be like this: 回答1: There's no built-in way. You can just put a button on top of it. I'm guessing that button was just well-designed to look right in that position :) 来源： https://stackoverflow.com/questions/7211996/add-a-button-to-uipickerview

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 NSDate *currentDate = [NSDate date]; NSDateFormatter *format = [[NSDateFormatter alloc] init]; [format setDateFormat:@"MM/dd/yyyy,h,mm,a"]; NSString *dateString = [format stringFromDate:currentDate]; [format release]; NSLog(dateString); Output in: Device iPhone4 [240:707] 10/25/2011,22,23, Current language: auto; currently objective-c warning: Unable to read symbols for /SDK4.2/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib Output

问题 I would like to know whether the Cache directory gets deleted when upgrading iOS? 回答1: There are no clear answer for this in the documentation. It can be purged when the device gets low on disk space or performing a full restoration. Application_Home/Library/Caches Use this directory to write any application-specific support files that you want to persist between launches of the application or during application updates. Your application is generally responsible for adding and removing these

问题 I started to develop ionic 2 cordova app on mac and doesn't update ios Application. My pc specs are, node v8.9.1 npm v5.5.1 cordova v7.1.0 ionic v3.17.0 editor VSCode if I want some code change in ionic-v1 then I can edit platform -> ios -> www ->.js files or platform -> ios -> www ->.html files and reload xcode then changes appear on real device. But in ionic 2 app platform -> ios -> www folder contain minified files and cannot edit these files. so I follow this process but code doesn't

问题 I started to develop ionic 2 cordova app on mac and doesn't update ios Application. My pc specs are, node v8.9.1 npm v5.5.1 cordova v7.1.0 ionic v3.17.0 editor VSCode if I want some code change in ionic-v1 then I can edit platform -> ios -> www ->.js files or platform -> ios -> www ->.html files and reload xcode then changes appear on real device. But in ionic 2 app platform -> ios -> www folder contain minified files and cannot edit these files. so I follow this process but code doesn't

问题 I don't understand why the font-size property on iPhone "landscape" seems larger than portrait or desktop browser... I have for body font-size: 100% and for text inside image 17px PORTRAIT LANDSCAPE I assure that in landscape version text seems larger. 回答1: Include this to your site: body { -webkit-text-size-adjust: none; } 来源： https://stackoverflow.com/questions/53103444/the-font-size-property-on-iphone-landscape-seems-larger