(I don't know how to use or what to call this, so I can't think of a better title).
I am using the PNChart classes, specifically PNBarChart. It requires that an array of numbers are given to the yValues.
I need to format this, for which it has PNYLabelFormatter. =
typedef NSString *(^PNYLabelFormatter)(CGFloat yLabelValue);
So when I type the following, what do I fill in the gap with?
[barChart setYLabelFormatter:GAP HERE];
I recognise I need to nest my formatting in this bit, but I don't know what to call this or how to format it.
You can find how to use this lib from examples.
$ pod try PNChat and you'll get demo project.
Open PCChartViewController.m look in block started with
else if ([self.title isEqualToString:#"Bar Chart"]) {
...
self.barChart.yLabelFormatter = ^(CGFloat yValue){
CGFloat yValueParsed = yValue;
NSString * labelText = [NSString stringWithFormat:#"%1.f",yValueParsed];
return labelText;
};
self.barChart setXLabels:#[#"SEP 1",#"SEP 2",#"SEP 3",...];
[self.barChart setYValues:#[#1,#24,#12,#18,#30,#10,#21]];
Related
I want to switch NSString in XmlParser because if there are 15 or more web-service then every time the loop check for correct element in IF..ELSE.That I don't want to make processor busy..
I have searched a lot and found using enum I can switch NSString but no luck ..
I have tried each possibilities,but some where i am making mistake.
Please help to solve this big problem for me.
Here I have declare my enum:
Here in "elementName" I am getting Exact value as declared in enum:
But instead of 1, I am getting wrong value Like 202896536:
You cant do it by creating enum. You must need to compare the string.
if([elementName isEqualToString:#"UserLoginComplexType"])
//Do something...
You can not cast a string to ENUM value, you will need to parse it, ENUM values are integers not strings.
You will have to use an if statement.
You could use a helper method:
WebServiceList.h
typedef NS_ENUM(NSUInteger, WebServiceList) {
WebServiceListNone = 0,
UserLoginComplexType = 1,
RegisterUserResult = 2,
RecoverPasswordResult = 3,
....
};
FOUNDATION_EXTERN WebServiceList WebServiceListForString(NSString *string);
WebServiceList.m
WebServiceList WebServiceListForString(NSString *string) {
WebServiceList list = WebServiceListNone;
if (![type isKindOfClass:[NSString class]]) {
return CallRecordTypeNone;
}
else if ([string isEqualToString:#"UserLoginComplexType"] {
list = UserLoginComplexType;
}
else if ([string isEqualToString:#"UserLoginComplexType"]) {
list = UserLoginComplexType;
}
else .....
return list;
}
As seen in your commented codes, you're parsing a XML and saving in a NSMutableArray named arrProductList in App Delegate.
After finishing the parsing of XML, the variable should contain the data in array. You should look into the variable & fetch the corresponding value. Since you didn't post any further details about parsing / XML structure, I'm unable to write some codes related to result fetching.
For easy readability and to avoid lots of if-else statements, I like to do mine as a dictionary:
(also makes it easy to update in the future when you add more to your enum)
NSString* elementName = ...;
// Default value
WebServiceList value = UserLoginComplexType;
NSDictionary* stringToEnum = #{#"UserLoginComplexType":#(UserLoginComplexType),
#"RegisterUserResult":#(RegisterUserResult),
#"RecoverPasswordResult":#(RecoverPasswordResult)};
NSNumber* enumValue = stringToEnum[elementName];
if(enumValue != nil)
value = (WebServiceList)enumValue.integerValue;
I thought I had nailed converting an int to and NSString a while back, but each time I run my code, the program gets to the following lines and crashes. Can anyone see what I'm doing wrong?
NSString *rssiString = (int)self.selectedBeacon.rssi;
UnitySendMessage("Foo", "RSSIValue", [rssiString UTF8String] );
These lines should take the rssi value (Which is an NSInt) convert it to a string, then pass it to my unity object in a format it can read.
What am I doing wrong?
NSString *rssiString = [NSString stringWithFormat:#"%d", self.selectedBeacon.rssi];
UPDATE: it is important to remember there is no such thing as NSInt. In my snippet I assumed that you meant NSInteger.
If you use 32-bit environment, use this
NSString *rssiString = [NSString stringWithFormat:#"%d", self.selectedBeacon.rssi];
But you cann't use this in 64-bit environment, Because it will give below warning.
Values of type 'NSInteger' should not be used as format arguments; add
an explicit cast to 'long'
So use below code, But below will give warning in 32-bit environment.
NSString *rssiString = [NSString stringWithFormat:#"%ld", self.selectedBeacon.rssi];
If you want to code for both(32-bit & 64-bit) in one line, use below code. Just casting.
NSString *rssiString = [NSString stringWithFormat:#"%ld", (long)self.selectedBeacon.rssi];
I'd like to provide a sweet way to do this job:
//For any numbers.
int iValue;
NSString *sValue = [#(iValue) stringValue];
//Even more concise!
NSString *sValue = #(iValue).stringValue;
NSString *rssiString = [self.selectedBeacon.rssi stringValue];
For simple conversions of basic number values, you can use a technique called casting. A cast forces a value to perform a conversion based on strict rules established for the C language. Most of the rules dictate how conversions between numeric types (e.g., long and short versions of int and float types) are to behave during such conversions.
Specify a cast by placing the desired output data type in parentheses before the original value. For example, the following changes an int to a float:
float myValueAsFloat = (float)myValueAsInt;
One of the rules that could impact you is that when a float or double is cast to an int, the numbers to the right of the decimal (and the decimal) are stripped off. No rounding occurs. You can see how casting works for yourself in Workbench by modifying the runMyCode: method as follows:
- (IBAction)runMyCode:(id)sender {
double a = 12345.6789;
int b = (int)a;
float c = (float)b;
NSLog(#"\ndouble = %f\nint of double = %d\nfloat of int = %f", a, b, c);
}
the console reveals the following log result:
double = 12345.678900
int of double = 12345
float of int = 12345.000000
original link is http://answers.oreilly.com/topic/2508-how-to-convert-objective-c-data-types-within-ios-4-sdk/
If self.selectedBeacon.rssi is an int, and it appears you're interested in providing a char * string to the UnitySendMessage API, you could skip the trip through NSString:
char rssiString[19];
sprintf(rssiString, "%d", self.selectedBeacon.rssi);
UnitySendMessage("Foo", "RSSIValue", rssiString );
I have pretty simple NSString
f.e
<scirpt attribute_1="x" attribute2="x" attribute3="x" ... attributeX="x"/>
I need to find specific parameter, let's say attribute2 and replace it's value,
I know the exact name of parameter f.e attribute2 but I don't know anything about it's value.
I guess it can be easily done by regexp, but I quite newbie on it.
In conclusion: I want to grab
attribute2="xxxx...xxx"
from incoming string
Note: I don't want to use some 3rd party libs to achieve that (it's temporary hack)
Any help is appreciated
I hacked it together with some string operations:
NSDictionary* valuesToReplace = #{#"attribute_1" : #"newValue1"};
NSString* sourceHtml = #"<scirpt attribute_1=\"x\" attribute2=\"x\" attribute3=\"x\" attributeX=\"x\" />";
NSArray* attributes = [sourceHtml componentsSeparatedByString:#" "];
for (NSString* pair in attributes)
{
NSArray* attributeValue = [pair componentsSeparatedByString:#"="];
if([attributeValue count] > 1) //to skip first "script" element
{
NSString* attr = [attributeValue firstObject]; //get attribute name
if([valuesToReplace objectForKey:attr]) //check if should be replaced
{
NSString* newPair = [NSString stringWithFormat:#"%#=\"%#\"", attr, [valuesToReplace objectForKey:attr]]; //create new string for that attribute
sourceHtml = [sourceHtml stringByReplacingOccurrencesOfString:pair withString:newPair]; //replace it in sourceHtml
}
}
}
It's really only when you want to hack it and you know the format :) Shoot a question if you have any.
you can try this.. https://github.com/mwaterfall/MWFeedParser
import "NSString+HTML.h" along with dependencies
And write like this...
simpletxt.text = [YourHTMLString stringByConvertingHTMLToPlainText];
I'm new to plists, and I really need to use one. What I have is a plist where different numbers are stored, under two dictionaries. I need to get that number which is stored, and make it an integer. This process will be run from a method called 'readPlist.
The plist is called 'properties.plist'. The first dictionary is called 'Enemies'. It contains various other dictionaries, which will have the name stored in the NSMutableString called 'SpriteType'. The name of the number will have the format 'L - %d', with the %d being an integer called 'LevelNumber'.
If possible, can someone give me the code on how to get that integer using the information, and the names of dictionaries above.
I have looked around at how to access plists, but the code that people have shown doesn't work.
Thanks in advance.
EDIT: Too make it more understandable, this is my plist. What i want in an integer, called 'SpriteNumber' to be equal to the value of 'L - %d'
If you read the contents of your plist into a dictionary (I won't tell you how to do it, but this is the tutorial I refer to often), then it's a matter of getting the string out of the key for the level with [[myDictionary objectForKey:#"key"]stringValue];. Then, using of NSString's extremely helpful -stringByReplacingOccurencesOfString:withString: to get rid of the "L -" part and only get a numerical value. Finally, get an integer from the string with [myString intValue].
well, the easiest way would be something like :
-(int) getMosquitoCountForLevel:(int) level {
int mosquitoCount=0;
NSString *gsFile = #"whateverFullyQualifiedFileNameYourPlistIs";
NSDictionary* definitions = [NSDictionary dictionaryWithContentsOfFile:gsFile];
NSDictionary* mosquitos = [definitions objectForKey:#"Mosquito"];
if(mosquitos) {
NSString *levelKey = [NSString stringWithFormat:#"L - %d",level];
NSNumber *mosquitoCountAsNumber = [mosquitos objectForKey:levelKey];
if(mosquitoCountAsNumber) {
mosquitoCount=[mosquitoCountAsNumber intValue];
} else {
CCLOGERROR(#"%# - Mosquito definitions in %# does not contain a en entry for level %#.",self.class,gsFile,levelKey);
}
} else {
CCLOGERROR(#"%# - file %# does not contain a Mosquito dictionary.",self.class,gsFile);
}
return mosquitoCount;
}
this compiles but not tested with actual data.
I am using GDataXML in my iOS application and want a simple way to format and print an XML string - "pretty print"
Does anyone know of an algorithm in Objective C, or one that works in another language I can translate?
You can modify the source code of GDataXMLNode direcly:
- (NSString *)XMLString {
...
// enable formatting (pretty print / beautifier)
int format = 1; // changed from 0 to 1
...
}
Alternative:
As I didn't want to modify the library directly (for maintenance reasons), I wrote that category to extend the class from outside:
GDataXMLNode+PrettyFormatter.h:
#import "GDataXMLNode.h"
#interface GDataXMLNode (PrettyFormatter)
- (NSString *)XMLStringFormatted;
#end
GDataXMLNode+PrettyFormatter.m:
#import "GDataXMLNode+PrettyFormatter.h"
#implementation GDataXMLNode (PrettyFormatter)
- (NSString *)XMLStringFormatted {
NSString *str = nil;
if (xmlNode_ != NULL) {
xmlBufferPtr buff = xmlBufferCreate();
if (buff) {
xmlDocPtr doc = NULL;
int level = 0;
// enable formatting (pretty print / beautifier)
int format = 1;
int result = xmlNodeDump(buff, doc, xmlNode_, level, format);
if (result > -1) {
str = [[[NSString alloc] initWithBytes:(xmlBufferContent(buff))
length:(xmlBufferLength(buff))
encoding:NSUTF8StringEncoding] autorelease];
}
xmlBufferFree(buff);
}
}
// remove leading and trailing whitespace
NSCharacterSet *ws = [NSCharacterSet whitespaceAndNewlineCharacterSet];
NSString *trimmed = [str stringByTrimmingCharactersInSet:ws];
return trimmed;
}
#end
I've used HTML Tidy (http://tidy.sourceforge.net/) for things like this. It's a C library so can be linked in to and called from an Objective C runtime fairly easily as long as you're comfortable with C. The C++ API is callable from Objective C++ so that might be easier to use if you're comfortable with Objective C++.
I've not used the C or C++ bindings; I did it via Ruby or Python but it's all the same lib. It will read straight XML (as well as potentially dirty HTML) and it has both simple and pretty print options.