IOS

IOS string truncation removes the content included in parentheses in the string   // Remove the position enclosed in parentheses-(NSString *) handleStringWithString :( NSString *) str {NSMutableString * muStr = [NSMutableString stringWithString:

ARC-do not send messages to released objects. arc-release sends messages.   1. Write the following code in AppDelegate. m:   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { //

-(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *) if the indexPath is not executed, uitableviewcell -(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *)

UITableView simple performance optimization, uitableviewThe memory of iOS devices is limited. If you use UITableView to display thousands of data records, you need thousands of UITableViewCell objects, which consumes the memory of iOS devices. To

Add and delete friends for XMPP and add friends for xmpp In the current communication service, there are various standards, so there will be a lack of connectivity, and the emergence of XMPP (Extensible Message and presence Protocol) Protocol, the

IOS-event handling for controls responding to user control eventsNot all objects in iOS can process events. Only objects that inherit UIResponder can receive and process events. We call it "responder object". UIApplication, UIViewController, and

Instancetype and id 1. Similarities Can be used as the return type of the method. 2. Differences Instancetype can return objects of the same type as the class of the method. id can only return unknown objects; Instancetype can only be used

IOS Block usage   # Import ViewController. h/*One of the biggest advantages of using Block is that you can access external variables at any time in the code Block.For example. A code block is defined in a method in the class. you can directly. the

IOS-member center page and logic Member Center interface:Different content is displayed based on the VIP status, and the button is set to jump to the payment page. Code /// MemberCenterViewController. h // SymptomChecker /// Created by C. l. wang

IOS recording practices In the AVFoundation framework, the AVAudioRecorder class specializes in recording operations and supports multiple audio formats. The following are common attributes and methods:   Attribute Description @

16th-day notes (Category/NSSet/NSIndexSet operation), nssetnsindexset Knowledge points of IOS Learning (oc language)   1. Introduction to NSSet and NSMutableSet   1) NSSet and NSMutableSet. elements are unordered and cannot have repeated values.   2

IOS carousel image implementation   # Define SCREEN_SIZE [UIScreen mainScreen]. bounds. size# Define KImageCount 3# Define KImage_Height 250@ Interface ViewController () @ Property (nonatomic, strong) UIScrollView * scrollView; @ Property

Example of sliding switching between multiple table views in iOS development (similar to the "toutiao" client) --- optimization (1), ios example A few days ago, I published a blog titled sliding switching examples of multiple table views (similar to

15th-day notes (operations on OC NSDate) and iosnsdate for IOS 1 NSDate * newdate = [NSDate date]; 2 // Time Format String 3 NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 4 [formatter setDateFormat: @ "yyyy-MM-dd HH: mm: ss MMM eee a"

IOS CoreImage dynamic rendering (filter) // // ViewController. m // CoreImageOfDong // // Created by Dong on 15/6/30. // Copyright (c) 2015 xindong. All rights reserved. // # Import ViewController. h # Import // Import this database @

Ios input address to obtain latitude and longitudeIos input address to obtain latitude and longitude  CLGeocoder * myGeocoder = [[CLGeocoder alloc] init]; [MyGeocoder geocodeAddressString: _ searchBar. text completionHandler: ^ (NSArray *

IOS study notes -- use ChildViewController and iosviewcontroller You have encountered problems when using TableView before. You need to use another TableViewController to store TableView first. The original View uses ViewContainer to reference

@ Import and # Use of import, In xcode 5, the new modules and auto-linking features are added to make project development easier. Using @ import to add a framework project is more effective than using # import. Modules and auto-linking are enabled

The ninth day of IOS Learning (memory management), and the ninth day of ios Knowledge Point sorting for IOS Learning (C language) I. Memory Management 1) malloc, used to apply for memory. The void * malloc (size_t) structure must reference the

Using UIView-Positioning for iOS development to simplify page layout and iosuiview Animation People who have used code layout may feel this way, and it is complicated to set frames for controls. As you can see on Github, there is a class of