IOS

IOS Study Notes-deadlock comprehension, iosdeadlock 1. First, let's take a look at the explanation in the official documentation. The queue of this block is executed synchronously. Unlike asynchronous, this method will not return until the block is

1.0 multi-Controller Management (Appendix: Demo), 1.0 demo Controller:   An iOS app is rarely composed of only one controller, unless the app is extremely simple When the app has multiple controllers, we need to manage

Custom UITabBarController for IOS development and custom tabbar for ios development UITabBarController is a view controller that is often used in development. However, the default UITabBarController does not fully meet our needs. Therefore, we

After iOS Xcode is packaged, logs cannot be output.   Symptom: A project has been well done before. After packaging and generating the ipa file, When running again, NSLog logs are no longer output.   Solution: In the mode selection, there are

Framework Onboard-guide page style creation library, framework onboard-style Set the background image or background movie, and then generate several viewcontrollers on them. The default is the top image. The title and details are shown below, and

Processing of (null) and in IOS development, iosnullAccidentally, during the development process, I got the (null) and return values. After searching for a long time, I found only one item about . To make necessary responses based on the returned

The client calls the js method in the web (C call B) for cross-origin issues, webjs These days, I encountered a difficult problem (c debugging B) and found out the problem through troubleshooting. I. The problem is described as follows: 1.client

Introduction to the properties of UIWebview and the properties of UIWebview     /* ViewController. h file */ # Import @ Interface ViewController: UIViewController @ End     /* ViewController. m file */ # Import "ViewController. h"   @ Interface

UINavigationController, uinavigationbar Knowledge point: 1) UINavigationController 2) UINavigationBar 3) UINavigationItem 4) UIToolBar ========================================================== ==================== I. UINavigationController   1.

04-switching image arrangement, 04-image Arrangement ViewController. h file: 1 @interface ViewController : UIViewController2 3 @property (weak, nonatomic) IBOutlet UISegmentedControl *segmentCtrl;4 5 - (IBAction)indexChange:(UISegmentedControl

A small tool class for image cropping. It is called using a code to crop the tool class. Some time ago, I wrote a simple small tool class, that is, image cropping, and animation changes to frame hiding; This class directly provides a class method

Common ios problems (Real-time update) and ios real-time update 1. Error code: No ubuntures to compile for (ONLY_ACTIVE_ARCH = YES, active arch = x86_64, VALID_ARCHS = armv7 armv7s) Command Line Error when building this target. You can search for

UIView and uiview Animation /* Layer relationship Child view-view nested on parent View Parent view-nested View The view and view can be nested layer by layer */ UIView * red = [[UIView alloc] initWithFrame: CGRectMake (50,100,100,100)]; Red.

IOS development diary 57-gradient effect SegmentControl, 57-segmentcontrol Today, the blogger has a demand for custom SegmentControl and has encountered some difficulties. I would like to share with you the hope to make common progress. Let's take a

Create and add a UIAlertController. I prefer the previous method of creating UIAlertView. Although the updated method of UIAlertController replaces the functions and functions of UIAlertView and UIActionSheet with a modular replacement method,

IOS development-ActionSheet usage and pop-up dialog box In our iOS development, we often see the following interface requirements: .   That is, click the button and a selection prompt box appears. We use two methods today (ActionSheet and

IOS accumulation: An error occurred while canceling the button when the SearchBar loses focus !, /* The programmer's goal is Conquer the sea of stars. */ ------ Problem reproduction: Many of the company's projects use friend management, so the use

[Code Note] single choice box, I ,. 2. Engineering Drawing. 3. Code. RootViewController. h # Import @ interface RootViewController: UIViewController // you can easily jump to the corresponding page @ property (nonatomic, retain) NSString * type; @

IOS deletes special characters in NSString, + (NSString *) stringDeleteString :( NSString *) str {NSMutableString * str1 = [NSMutableString stringWithString: str]; for (int I = 0; I You can delete numbers and symbols in nsstring, or modify

(No. 00005) iOS game for explosive bullet players (2): Material Selection Game protagonists and enemies First, it is the game's main character. from the Internet, we can find all the animated textures of the people who have been riding