IOS

IOS program error: reason: [NSArrayI addObject:]: unrecognized selector sent to instance, nsarrayiaddobject   * ** Terminating app due to uncaught exception 'nsinvalidargumentexception ', reason:'-[_ NSArrayI addObject:]: unrecognized selector

WGAFN _ network monitoring technology in iOS Third-party AFNetworking/SVProgressHUD is required No can follow my weibo private letter I. http://weibo.com/hanjunqiang   AppDelegate. m   #import AFNetworking.h#import SVProgressHUD.hCode implementation

IOS development-SQLite database (CRUD)Data storage in iOS Plist (NSArrayNSDictionary)Preference (Preference NSUserDefaults)NSCoding (NSKeyedArchiverNSkeyedUnarchiver)SQLite3Core DataSQLite Introduction What is SQLite?SQLite is a lightweight embedded

Use Masonry to build a special layout and compare it with xib. Previously, only a relatively small number of contacts with Masonry. Most of the layout s in the project are combined with the AutoLayout in the xib with the frame computing of the hand

IOS Core Animation learning Summary (2) -- Implement custom layers, iosanimation 1. Create a layer that inherits from CALayer and implements the drawInContext method in the subclass. @ Interface CTLayer: CALayer @ end @ implementation CTLayer-(void)

Basic knowledge of IOS development-fragment 24, basic knowledge of ios-Fragment 1: compatible with the font size 6 plue and the following differences #define FONT_COMPATIBLE_SCREEN_OFFSET(_fontSize_) [UIFont systemFontOfSize:(_fontSize_ *([UIScreen

Solution to Blurred Image Browsing under ios9 (ALAsset. thumbnail fuzzy) In ios9, photo browsers implemented using the ALAsset method all have the problem of photo blurring. However, most open-source photo browsers can be found using this framework.

IOS-how to integrate iOS9 3D Touch, ios-ios91. preface with the arrival of 6 s, 3DTouch was rapidly popularized by various popular apps. After the bloggers personally experience it, they found that the ease of use was greatly improved. Then they

Use Reachability in iOS to detect network and iosreachabilityUse Reachability in iOS to detect NetworksContent prompt:Offline mode (Evernote) is provided ). Then you will use the Reachability for network detection. The purpose of this article is to

Implement tableview pull-down refresh and tableview pull-down refreshImplement drop-down refresh of tableviewRecommended third-party pull-down refresh code http://code4app.com/ios/%E5%BF% AB %E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8

NSFileManager and NSFileHandle of IOS, nsfilehandle The number of temporary cache files for mobile apps in the current stage is gradually increasing. In app development, there are more and more operations on mobile device files. In IOS, file

Differences between NSString and SwiftString and nsstringstring Now there are more and more Swift projects, and you may often see str as NSString or str as String switching between the two, because some operations are more convenient with the OC

Filters and regular expressions (NSPredicate, NSRegularExpression) and nspredicate Regular Expressions in iOS Reference: http://www.cocoachina.com/industry/20140321/8024.html NSPredicate Cocoa provides an NSPredicate class to specify filter

[Reading Notes] iOS-object initialization, Reading Notes ios- 1. Allocate objects. Allocation is the process of the birth of an object. The best time is to get a piece of memory from the operating system and specify it as the location of the

There is no NavigationBar to a pitfall when there is a NavigationBar view switch, navigationbar View NavigationController is the most common in iOS apps. It can be said that it is essential for every App. Since iOS7, the system's built-in

UITabbar (similar to Sina Weibo Demo)   UITabBarController and UINavigationController are the navigation modes selected by most apps. UITabBarController's UITabBar is the UI part presented to users. Therefore, it is very important to understand its

IOS Today Extension/widget programming note From iOS8, in the drop-down "today", applications can add their own widgets, which are like this: This is called a widget in Android, but in iOS we call it Today Extension, because it is one of many types

IOS-simple filter effect achieved through CPU In iOS, the principle of using the CPU to implement the filter effect is very simple. Convert the image into pixel data, calculate the corresponding filter effect for each pixel, and then obtain the

OC basics-Xcode template modification and document installation, oc-xcode Modify a project template A project template is an entry selected during project creation. Xcode generates a fixed-format project based on the selected entry.   How to modify

Ios webview adaptive content height four methods // Method 1 -(Void) webViewDidFinishLoad :( UIWebView *) webView { CGFloat webViewHeight = [webView. scrollView contentSize]. height;   CGRect newFrame = webView. frame; NewFrame. size. height =