This isn’t tested, but should be a good start. NSUInteger count = 0, length = [str length]; NSRange range = NSMakeRange(0, length); while(range.location != NSNotFound) { range = [str rangeOfString: @”cake” options:0 range:range]; if(range.location != NSNotFound) { range = NSMakeRange(range.location + range.length, length – (range.location + range.length)); count++; } }
Use a ternary operator: BOOl isKind= [thing isKindOfClass:[NSString class]]; NSLog(@”Is Kind of NSString: %d”, isKind); NSLog(@”Is Kind of NSString: %@”, isKind ? @”YES” : @”NO”);
You can call [aDictionary description], or anywhere you would need a format string, just use %@ to stand in for the dictionary: [NSString stringWithFormat:@”my dictionary is %@”, aDictionary]; or NSLog(@”My dictionary is %@”, aDictionary);
NSString *data = @”abcde,”; if([data hasSuffix:@”,”]) // This returns true in this example // do something
I didn’t like putting the enum on the heap, without providing a heap function for translation. Here’s what I came up with: typedef enum {value1, value2, value3} myValue; #define myValueString(enum) [@[@”value1″,@”value2″,@”value3″] objectAtIndex:enum] This keeps the enum and string declarations close together for easy updating when needed. Now, anywhere in the code, you can use the … Read more
You can convert an NSString into a UTF8 string by calling the UTF8String method: printf(“%s”, [string UTF8String]);
If you want to add newline in Xcode5 / Xcode6 storyboard Attribute-Inspector (AI), you do it this way: Drag out a UITextView. Double-click it to edit text, place cursor where you want the paragraph break. Hit alt-Enter a couple of times to create a blank line & paragraph. Or, CTRL + Return make a new … Read more
Swift 3.0 if let path = Bundle.main.path(forResource: “TextFile”, ofType: “txt”) { do { let data = try String(contentsOfFile: path, encoding: .utf8) let myStrings = data.components(separatedBy: .newlines) TextView.text = myStrings.joined(separator: “, “) } catch { print(error) } } The variable myStrings should be each line of the data. The code used is from: Reading file line … Read more
NSString *dateStr = @”20100223″; // Convert string to date object NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@”yyyyMMdd”]; NSDate *date = [dateFormat dateFromString:dateStr]; // Convert date object to desired output format [dateFormat setDateFormat:@”EEEE MMMM d, YYYY”]; dateStr = [dateFormat stringFromDate:date]; [dateFormat release]; Hope this will help you.
Either via: NSString *immutableString = [NSString stringWithString:yourMutableString]; or via: NSString *immutableString = [[yourMutableString copy] autorelease]; //Note that calling [foo copy] on a mutable object of which there exists an immutable variant //such as NSMutableString, NSMutableArray, NSMutableDictionary from the Foundation framework //is expected to return an immutable copy. For a mutable copy call [foo mutableCopy] instead. … Read more