IOS

IOS: before the date is converted to xx // Before converting a date to xx @ interface NSString (date) + (NSString *) dateString :( NSString *) dateStr; @ end @ implementation NSString (date) + (NSString *) dateString :( NSString *) dateStr {NSDate *

IOS local data storage (1)   UserDefaults for local data storage   The basic data types supported by UserDefaults include: NSData,NSString,NSNumber,NSDate,NSArray, OrNSDictionary   If you store a custom class directly, the following error

Enter 6 digits in the ios input box -(BOOL) textField :( UITextField *) textField shouldChangeCharactersInRange :( nsange) range replacementString :( NSString *) string {if (textField. tag = 11) {// new password if (range. location 0) {unichar

IOS learning notes OC-API-common structures, 2015-03-24oc-api- A title common struct 2 API 1 nsange indicates A range A instantiation of nsange rg = {3, 5 }; // The first parameter is the starting position. The second parameter is the length. B is

Convert NSData to NSString, Byte, UIImage, and nsdatansstring in Object-C 1. NSData and NSString NSData --> NSString * aString = [[NSString alloc] initWithData: adata encoding: NSUTF8StringEncoding]; NSString --> NSData NSString * aString = @ "1234 "

IOS development-Code Snippets (Code Snippets) improve development efficiency.   Introduction A new feature introduced in XCode4 is "Code snippet (Code Snippets )". For some frequently used Code, abstract it into a template and put it into Code

AFNetworking compilation error: Property with 'retain (or strong) 'attribute must be of object type, afnetworkingretain AFNetworking 2.0 when Deployment Target is lower than 6.0, AFURLConnectionOperation. h, AFURLSessionManager. h @property

IOS monitors changes in textField values in real timeConsidering the proxy method: TextFieldDidEndEditing cannot listen for real-time changes in textFiled. To implement real-time monitoring, we recommend that you register a notification to listen

IOS File Management 2 and ios File ManagementIOS development-File Management (2) 5. Plist files Add in String Mode NSString * path = [NSHomeDirectory () stringByAppendingPathComponent: @ "Array. plist"]; NSString * content = @ "abcd "; [Contect

Dark Horse Programmer -- OC struct in Foundation, foundationoc   OC struct Nsange NSPoint \ CGPoint NSSize \ CGSize NSRect \ CGRect 1. nsange: The range (Position, length) of Characters in the string) Use typedef to define the nsange struct

On iOS, double-click Home to switch If you double-click Home, you will be taken to the iOS App's switcher page, where the App suspended by the current system is listed. The screen-cutting of each App is displayed. I believe everyone is familiar

Ios multi-thread operations (iii) -- thread CommunicationIn a process, threads do not exist independently. They often need to communicate with other threads to execute specific tasks. Next, we will use a simple example to implement the simplest

Explore iOS network development and data parsing ., Ios Let's take a look at the oc network programming and data parsing (json) through the development of the public comments platform)   First, we need to apply for a key on the public comment

IOS study notes, ios2015-03-18 Objective -- C key word 1 KVC dynamic value setting, dynamic value, similar to reflection in java, in addition, you can also set and obtain the second function 2, the second function 1, and the retain to reference the

In iOS, UIKit-UIDataDetectors (Data detector) changes the phone number, email address, and website address to a link. iosuikit 1. It is used for UITextView and UIWebView. The attribute name is dataDetetorTypes. 2. This attribute can be used to

Create tanbar for iOS7 story Edition In ios7, the method setFinishedSelectedImage: withFinishedUnselectedImage: has been discarded. Therefore, if you set selectImage and image of tabBarItem directly, the image cannot be displayed. This is obviously

IOS basics-alloc, init, and new methods, iosallocinitnew Alloc: memory allocation. Init: initialization. New: instead of the above two functions: allocate memory and initialize.   Note: 1. In actual development, new is rarely used. Generally,

[0, 2I. Memory Management Overview Garbage collection mechanism (GC): memory is managed by the system, which is not required by programmers. Garbage collection in OC: add garbage collection in OC2.0. OC and iOS: OC have a garbage collection

15. ios z2d for ios 1. What is Quartz2D?  • Quartz2D is a two-dimensional Drawing Engine that supports both iOS and Mac systems • Quartz 2D work drawing: draw lines, triangles, rectangles, arcs, and other words to generate images) read and generate

When a button appears, it has an animation effect.   Code: -(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. UIButton * button = [UIButton buttonWithType: UIButtonTypeRoundedRect];