elliptical way. Need to use CGPATHADDARC,CGPATHADDARC is often used to draw a positive circle, such as the following is a positive circle, the meaning of each parameter:
160,200 is the center of the circle, 100 is the radius (startangle,endangle) is the starting angle and the end angle, 1 is clockwise, 0 is counterclockwiseCgpathaddarc (Curvedpath, NULL, 160,200, StartAngle, Endangle, 0);
Note that because the coordinate system in iOS is the opposi
Objective
I believe every iOS developer knows that UITableView's left-sliding feature is cool, and sometimes left-sliding features are more than just deleting one, sometimes with other functions like the top, which requires a custom left-slip
Sample code
-(nsarray
Summarize
We can use Uitableviewrowaction to create objects, the following code block is clicked after the implementation of the method, created objects added to the array,
service";
ssize_t size_t = Send (Self.sock, SendData, strlen (SendData), 0);
NSLog (@ "%zd", size_t);
}
-(void) recvdata{
//acceptance data, placed in the child thread
ssize_t bytesrecv =-1;
Char recvdata[32] = "";
while (1) {
bytesrecv = recv (self.sock, RecvData, 0);
NSLog (@ "%zd%s", bytesrecv,recvdata);
if (Bytesrecv = = 0) {break
;
}}
}
All right, I'm going to use the socket for two apps on the local phone. The first time to write a blog, one is to record thei
nonnull
null_resettable function: Get: Cannot return to NULL, set can be empty
Writing methods:
@property (nonatomic, Strong, null_resettable) NSString *name;
Note that if you use null_resettable, you must override the Get method or the set method to handle the case where the passed value is null
_null_unspecified: not sure if null
This is the only
way to write a
@property (nonatomic, strong) NSString *_null_unspecified name;
Mode two
@property (nonatomic, strong) NSString
Let's take a look at the effect chart.
The following words not much, we directly on the code:
#import "ViewController.h" @interface Viewcontroller ()
Summarize
Above is how iOS get system photo of the sample code, the need for friends can be used directly, the development of everyone is still very helpful, if you have questions can be exchanged message.
Objective
In the development of the project, the encounter needs may be let us enter only a paragraph of pure numbers, this time we have to filter the string to judge, do not conform to the pure number of prompts to operate, in order to achieve the best interactive effect can meet the needs.
Here are a few ways to determine whether a string is a pure number
The first way is to use Nsscanner:
1. Shaping Judgment
-(BOOL) Ispureint: (NSString *) string{
nsscanner* scan = [Nsscanner scan
considerable. In iOS development, saving memory means improving overall performance.
Example application of the pattern of the privilege
We created a websitefactory factory class to maintain the objects in the pool, returning various types of specific objects based on the parent type, with the following code:
Copy Code code as follows:
#import #import "WebSiteProtocol.h"
@interface Websitefactory:nsobject
@property (nonatomic,
This example for you to share the iOS using Uiimageview control animation method for your reference, the specific content as follows
Add 40 tomcat pictures to the list of resources: The name is cat_eat0000.jpg to Cat_eat0039.jpg.1, define the required controls
define buttons, picture controls, variable array objects
UIButton *actionbuttom;
Uiimageview *imagemove;
Nsmutablearray *imgsarray;
2. Initialize each control
Image An
When two-dimensional code needs to be scanned in a project, it automatically distinguishes between Android and iOS systems for different downloads for different systems.
I. Preface
1. The first time to write a blog, you can say that the summary of online resources, the similarities are more magnanimous.
2. The official review of app shelves in March 15 does not allow you to be prompted to update the words for upgrades. But the rule is dead, and the man is alive. There are still free to drill.
Two. Two ways to prompt for version updates
There are basically two kinds of tips for updating:
1. In the settings have "check the update", check the version, do not focus
iOS face Test 12-runloop is what. Runloop is literally the meaning of running loops, which is not bad, it is indeed a concept of the loop, or exactly the loop in the thread. Some programs are a circle, this circle is essentially the so-called runloop, is a cycle, but this cycle to add a lot of features.
First of all, the beginning of the loop body needs to detect whether there is a need to deal with the event, if there is to deal with, if not then go
options Launch Images source and Launch screen File , with the launch Images source, on behalf of a similar method with AppIcon, import different sizes of pictures to fit different screens (remember to empty launch screen file)
3.5 inch:
Pixel size: 640x960 fit with IPhone 4
4.0 inch screen:
Pixel size: 640x1136 fit with IPhone 5
4.7 inch Screen:
Pixel size: 750x1334 fit with IPhone 6
5.5 inch screen:
Pixel size: 1242x2208 adaptation of the IPhone 6 Plus clicks launch Images Source in the use
There are several problems in getting mobile phone usage traffic:①ios is unable to monitor the boot and shutdown broadcasts like Android, immediately shuts down and then turns on, and the traffic on the monitored mobile network is emptied by default.② application in the background running, suddenly killed, unable to traffic statistics, need to be in the background when the application to save the flow of usage③ If the user first opens the flow statist
, cloud call center and other functions. Pro-plus instant Messaging cloud
Enter the official website
The pro-plus instant Messaging cloud helps developers implement a single chat, group chat, and chat room function within the application by providing the SDK and API to developers. Where the API provides a complete chat room and one-on-one single chat function, through the application of the pro-plus API, can achieve text, pictures and voice transmission and reception. Leancloud Live Message
Ente
URL coding Problems in iOS
Roche (http://www.cnblogs.com/kesalin/) This article follows the authoring common agreement "signed-non-commercial-Consistent"
NSString's stringbyaddingpercentescapesusingencoding can encode URL parameters, but there is a slight problem that does not encode all the characters that need to be encoded. We can go through the cfstringref.
Cfurlcreatestringbyaddingpercentescapes function to encapsulate this function. The code is
white space at the top and bottom (because scrolling through the translucent navigation bar or under the Tabbar, you need to be able to see the effect), whether or not to reserve the blank can be uiviewcontroller by the
This property is controlled by the automaticallyadjustsscrollviewinsets (the default Yes, which indicates that whitespace is reserved).
as long as you use iOS to develop, you can find.
a controller that appears Uiscrollview (includin
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.