ios dev salary

First, the touch event transfer principle(1) The large direction is: passed from the parent control to the child control.--The parent control checks whether it can accept event handling first--and then look at the touch that's not in your own range--if so, iterate over the child controls. See if there are any suitable child controls to handle--assuming that the child controls are not appropriate, then the parent control will handle it on its own.Another big rule is that events are usually from u

development of OC, IOS, MAC program necessary framework, if you want to use the entire framework of content, including the framework of the main header file. The primary header file is the most important header file in a framework, with the main header filename and frame name consistent for each frame.namely: #import Run the following procedure:　　　　(1) Write the OC source file. M. C(2) Compiling files cc-c xx.m xxx.c(3) Link cc xx.o xxx.o-framework F

The article about sandbox and file operation wrote several, in the process of writing deepened their memories. Today to do a summary, is a sort of knowledge points.Article carding1 iOS development sandbox mechanism (sandbox)This is a basic knowledge of sandbox tutorials. The role of Sandbox is briefly described, and the differences between documents, Library and TMP are introduced. Open the sandbox in two ways to see what's in it.2

Bnrhypnosisview objectsCGRect Screenrect =Self.window.bounds; CGRect Bigrect=Screenrect;//bigRect.size.height *=2.0;BigRect.size.width *=2.0; //Create a Uiscrollview object, set its size to the window sizeUiscrollview *scrollview =[[Uiscrollview alloc] initwithframe:screenrect]; [ScrollView Setpagingenabled:yes]; //Create a large size bnrhypnosisview (modify to create a wide view with screen etc.)Bnrhyponsisviewtwo *hyponsisview =[[Bnrhyponsisviewtwo alloc] initwithframe:screenrect];

receivedProcessing URL request-(BOOL) Application: (UIApplication *) application Handleopenurl: (Nsurl *) url{ NSLog (@ "%@", url); if ([[URL scheme] isequaltostring:@ "Myurltest"]) { //process link nsstring *text = [[URL host] Stringbyreplacingpercentescapesusingencoding:nsutf8stringencoding]; Uialertview *myalert = [[Uialertview alloc]initwithtitle:@ "New Message" Message:text delegate:self cancelButtonTitle:@ "yes" Otherbuttontitles:nil]; [Myalert sho

(1) Use size Classes in storyboard.We have used AutoLayout before, and now we have a size Classes, which can be seen as AutoLayout settings under different size Classes.Detailed tutorials, http://www.cocoachina.com/ios/20141020/9978.html--Seemingly, storyboard's functions are becoming more powerful. The adaptation of different sizes and screens is enough to make it a pain to hit the code.--Find a lot of blog posts, found that almost all talk about how

(1) Effect(2) Case source code free downloadGroup Purchase page +ios source code + head AD Carousel + Bottom Load more(3) SupplementIn the source code, there is a flaw: because it is single-threaded, so when you drag the page up and down, the picture carousel above will stop. So we need to balance the solution and add the timer to the current runloop.That is, add a line of code to the Playon method in WPTGHEADERVIEW.M:-(void) playon{ timer=[nstimer

layer, we actually have 0, 1, 2 in the sub-view array. The allocation order also changes synchronously, this is known when using Exchangesubviewatindex, because it is directly the order of the array of exchanges, you can check Nsarray by the following methods: Subview2=self.view.subviewS UIView *view11=[subview2 Objectatindex:5]; View11.backgroundcolor=[uicolor Purplecolor]; [Super Viewdidload]; Do any additional setup after loading the view, typically from a nib.} We want to change th

Sometimes you need to connect to the network during iOS development. When the access request detects that the network is unavailable, you need to prompt the user to manually set up the network and inform the user of the operation path setting available networks.Just one line of code:-(void) Viewdidload {[Super Viewdidload];UIButton *button = [UIButton buttonwithtype:uibuttontypecustom];Button.backgroundcolor = [Uicolor Redcolor];Button.frame = CGRectM

decodeDoubleForKey:@"height"]; } return self;}Read and Write methods in the controller.- (ibaction) Save {//1. New Model ObjectStudent *stu = [[Student alloc] init]; Stu. No= @"42343254"; Stu. Age= -; Stu. Height=1.55;//2. Archiving Model Objects //2.1. Get full path to documents NSString*doc = [Nssearchpathfordirectoriesindomains (NSDocumentDirectory, Nsuserdomainmask,YES) Lastobject];//2.2. Get the full path of the file NSString*path = [Doc stringbyappendingpathcomponent:@"Stu.

In the iOS SDK, the highlighted background color for UITableViewCell only supports two colors, uitableviewcellselectionstyleblue and Uitableviewcellselectionstylegray.So how do you customize this color? One idea is to set the background color of the cell you want when the cell is clicked, and reset the cell back to the original background color when the click is released, so that you can achieve the desired effect.The following is the implementation-

IOS Dev (60) How to implement PlaceHolder in UitextviewArri Address: Http://blog.csdn.net/prevention-Follow your uitextview to define a UILabel.UILabel *inputPlaceHolder;PlaceHolder is not displayed when there is content. Display when no content is present. It is therefore possible to implement uitextviewdelegate in the corresponding class for the instance in which the following methods are used.- (void)tex

); Draw Arc Cgcontextaddarc (CTX, M_pi_4, M_PI, 1); Cgcontextstrokepath (CTX); Draw 1/4 circles, as well as set new methods of color Cgcontextmovetopoint (CTX, 10, 230); Cgcontextaddlinetopoint (CTX, 10, 280); Cgcontextaddlinetopoint (CTX, 60, 280); Cgcontextaddarc (CTX, ten, 280, 0,-m_pi_2, 1); [[Uicolor Greencolor]Setstroke]; Cgcontextstrokepath (CTX); Draw pictures and text (do not need to get the context manually) NSString *[emailprotected] "Xin-chou-an-year-e

"]; Fourthvc.tabbaritem.image=[uiimage imagenamed:@ "Tab_me_nor"]; Firsvc.view.backgroundcolor=[uicolor Redcolor]; Secondvc.view.backgroundcolor=[uicolor Whitecolor]; Thirdvc.view.backgroundcolor=[uicolor Purplecolor]; Fourthvc.view.backgroundcolor=[uicolor Greencolor]; Add a child controller in the following ways//[emailprotected][firsvc,secondvc,thirdvc,fourthvc]; [Self addchildviewcontroller:firsvc]; [Self ADDCHILDVIEWCONTROLLER:SECONDVC]; [Self ADDCHILD

=yes; The following settings play speed, can be tested with//_audioplayer.rate=10;//_audioplayerdict[filename]=audioplayer; }if (!_audioplayer.isplaying) {[_audioplayer play]; } return _audioplayer;} + (void) Musicpause: (NSString *) filename{if (!filename) return; Avaudioplayer *audioplayer=_audioplayerdict[filename]; if (audioplayer.isplaying) {[Audioplayer pause]; }}+ (void) Musicstop: (NSString *) filename{if (!filename) return; Avaudioplayer *audioplayer=_audioplayerdic

; };The workaround is as follows. It is not possible to place __unsafe_unretained directly on the line where the person object was created. Because if that's the case, the person object is a weak pointer, and is born dead. The purpose of introducing weak pointer Person0 is to use a weak reference when the person0 of the Block code refers to the object, so that no 2 strong references are pointed to each other. You can also use __weak. Person *person=[[person Alloc]init]; __unsafe_unretai

coordinates of the PIN, title and sub-title >>> finally add the pin to the mapThe core is: The system comes with a pin can not set the coordinates (read-only), so we generally write a model of inheritance NSObject, the Coordinate,title,subtile attribute is written in, the key is that this model needs to follow #import Then use:-(void) viewdidload { [super viewdidload]; ...... Monitor click, Pin [Self.mapview addgesturerecognizer:[[uitapgesturerecognizer alloc] initwithtarget:self ac

]; Self.reversedetailaddresslabel.text=pm.name; } }];}(7) Supplementary Cllocationmanager of another knowledge, scope of monitoring. For example, 360 children watch the function of entering an area and leaving an area on the alert.-Compliance with agreements cllocationmanagerdelegate>--Then, create a zone, the first method below has been reimbursed, now with the second method, that is clregion with clcircularregion to create this is not very easy to think.Clregion *region=[[clregion al

Error:nil]; [[Avaudiosession sharedinstance] Setactive:yes Error:nil];The avaudiosessioncategoryplayback is set to indicate that the user is switching to silent mode or the lock screen is ignored and the music continues to play. And don't play music from other apps, of course you can set Kaudiosessionproperty_overridecategorymixwithothers to mix music with other apps.In addition to Avaudiosessioncategoryplayback, there are the following other categoryNSString *const avaudiosessioncategoryamb

"; NSData *authdata=[authstr datausingencoding:nsutf8stringencoding]; NSString *result=[authdata base64encodedstringwithoptions:0]; NSString *authstring=[nsstring stringwithformat:@ "Basic%@", result]; [Request setvalue:authstring forkey:@ "Authorization"]; Nsurl *fromurl=nil; Nsurlsession *session=[nsurlsession sharedsession]; Nsurlsessionuploadtask *task=[session uploadtaskwithrequest:request fromfile:fromurl completionHandler:^ (NSData * Data, Nsurlresponse *respo