nsstring

How can I get the selected text's string from a NSTextView as an NSString ? Your help is greatly appreciated. Since NSTextView is a subclass of NSText, you can use NSText instance methods to figure out the selected string like so: NSString *selected = [[myTextView string] substringWithRange:[myTextView selectedRange]]; An NSText can have more than only one selection. Check it out with TextEditapp: select a string with the mouse while pressing CMD. So you can select as many strings as you want. Therefore I think, a more common solution is to use: NSArray *ranges = [myTextView selectedRanges];

iOS 中的runtime可以获取一个类的所有属性，成员变量，方法，协议等 通过获取到方法名，项目中可以直接通过selector 去调用第三方的方法，实现我们直接调用第三方api无法实现的方法 //属性 +(void)getProperties:(NSString*)className { u_int count = 0; objc_property_t *properties = class_copyPropertyList(NSClassFromString(className), &count); for (int i = 0; i < count; i++) { const char *propertyName = property_getName(properties[i]); const char *attributes = property_getAttributes(properties[i]); NSString *str = [NSString stringWithCString:propertyName encoding:NSUTF8StringEncoding]; NSString *attributesStr = [NSString stringWithCString:attributes encoding:NSUTF8StringEncoding];

I have a UITextView and i would like to limit the number of characters a user can input. i have also tried to display a warning if the textfield is empty but to no luck. textview.h @property (nonatomic,strong) IBOutlet UITextView *textField; @property (nonatomic, retain) NSString *userText; textview.m - (IBAction)next:(id)sender { self.userText = self.textField.text; if ([self.textField.text length] == 0) { UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error!" message:@"Enter some text" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alertView show]; } } here is

I need append the following characters ‡, †, * as superscript to NSString in iOS . Need your help. I use the following http://en.wikipedia.org/wiki/General_Punctuation_(Unicode_block) link but they are appending to NSString , But i want them as superscript Try to use this one. And you need to #import <CoreText/CTStringAttributes.h> . This code works only in iOS6 or later version. UILabel *lbl = [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 200, 40)]; NSString *infoString=@"X2 and H20 A‡ B† C*"; NSMutableAttributedString *attString=[[NSMutableAttributedString alloc] initWithString

This question already has answers here : Closed 7 years ago . Possible Duplicate: Is there a difference between setting a property with the dot or the bracket syntax? If I define a label in the .h file and I want to change the text of it in the .m file, is there really a difference between using label.text = @"..." and [label setText:@"..."] ? They appear to do exactly the same thing, and if that's the case, then why the different ways to do it? dasblinkenlight There is no difference in the inner workings. The first way requires the type of label to be such that the compiler could verify the

I am wanting to draw an NSString and a border onto a UIImage that I already have. I found a method that will draw an NSString as a UIImage, but I need it to draw on an image that I provide. -(UIImage *)imageFromText:(NSString *)text { // set the font type and size UIFont *font = [UIFont systemFontOfSize:20.0]; CGSize size = [text sizeWithFont:font]; // check if UIGraphicsBeginImageContextWithOptions is available (iOS is 4.0+) if (UIGraphicsBeginImageContextWithOptions != NULL) UIGraphicsBeginImageContextWithOptions(size,NO,0.0); else // iOS is < 4.0 UIGraphicsBeginImageContext(size); //

While fetching a UTF-8 -encoded file over the network using the NSURLConnection class, there's a good chance the delegate's connection:didReceiveData: message will be sent with an NSData which truncates the UTF-8 file - because UTF-8 is a multi-byte encoding scheme, and a single character can be sent in two separate NSData In other words, if I join all the data I get from connection:didReceiveData: I will have a valid UTF-8 file, but each separate data is not valid UTF-8 (). I do not want to store all the downloaded file in memory. What I want is: given NSData , decode whatever you can into an