blocks|key|976120|text|我解决了我的问题，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|976121|我实现了UITextView的委托，并实现了以下方法|976122|-+(void)textViewDidChangeSelection:(UITextView+*)textView+{
++++NSRange+r+=+textView.selectedRange;
++++NSLog(@"Start+from+:+%25d",r.location);+//starting+selection+in+text+selection
++++NSLog(@"To+:+%25d",r.length);+//+end+position+in+text+selection
++++NSLog([tv.text+substringWithRange:NSMakeRange(r.location,+r.length)]);+//tv+is+my+text+view
}|code-block|syntax|javascript|976123|就这样!|976124|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>I did solve my query as follow :</p>

<p>I implement UITextView's delegate and implement following method</p>

<pre><code>- (void)textViewDidChangeSelection:(UITextView *)textView {
    NSRange r = textView.selectedRange;
    NSLog(@"Start from : %d",r.location); //starting selection in text selection
    NSLog(@"To : %d",r.length); // end position in text selection
    NSLog([tv.text substringWithRange:NSMakeRange(r.location, r.length)]); //tv is my text view
}
</code></pre>

<p>That's it!</p>


blocks|key|976143|text|-[UITextField+selectedText]|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|976144|虽然UITextField没有selectedText方法，但它符合UITextInput+protocol。因此，您可以使用UITextInput协议所需的属性和方法来确定UITextField+*textField+(或任何符合UITextInput协议的对象，如UITextView)的selectedText。|976145|NSString+*selectedText+=+[textField+textInRange:textField.selectedTextRange];
NSLog(@"selectedText:+%25@",+selectedText);|code-block|syntax|javascript|976146|另外，您还可以使用UITextInput所需的属性和方法来计算UITextField+*textField的selectedRange。|976147|UITextRange+*selectedTextRange+=+textField.selectedTextRange;
NSUInteger+location+=+[textField+offsetFromPosition:textField.beginningOfDocument
+++++++++++++++++++++++++++++++++++++++++toPosition:selectedTextRange.start];
NSUInteger+length+=+[textField+offsetFromPosition:selectedTextRange.start
+++++++++++++++++++++++++++++++++++++++toPosition:selectedTextRange.end];
NSRange+selectedRange+=+NSMakeRange(location,+length);
NSLog(@"selectedRange:+%25@",+NSStringFromRange(selectedRange));|976148|-[UITextFieldDelegate+textFieldDidChangeSelection:]|976149|尽管UITextFieldDelegate没有像-[UITextViewDelegate+textViewDidChangeSelection:]那样声明textFieldDidChangeSelection:委托方法，但是当UITextField的选择发生变化时，您仍然可以将其挂钩。为此，将UITextField子类化并使用方法切换将您自己的代码添加到textField.inputDelegate的本机-[UITextInputDelegate+selectionDidChange:]实现中。|976150|//+MyTextField.h

#import+<UIKit/UIKit.h>

@interface+MyTextField+:+UITextField

@end


//+MyTextField.m

#import+<objc/runtime.h>
#import+"MyTextField.h"

UIKIT_STATIC_INLINE+void+mySelectionDidChange(id+self,+SEL+_cmd,+id<UITextInput>+textInput);

@implementation+MyTextField+{
++++BOOL+swizzled;
}

#pragma+mark+-+UIResponder

//+Swizzle+here+because+self.inputDelegate+is+set+after+becomeFirstResponder+gets+called.
-+(BOOL)becomeFirstResponder+{
++++if+([super+becomeFirstResponder])+{
++++++++[self+swizzleSelectionDidChange:YES];
++++++++return+YES;
++++}+else+{
++++++++return+NO;
++++}
}

//+Unswizzle+here+because+self.inputDelegate+may+become+the+inputDelegate+for+another+UITextField.
-+(BOOL)resignFirstResponder+{
++++if+([super+resignFirstResponder])+{
++++++++[self+swizzleSelectionDidChange:NO];
++++++++return+YES;
++++}+else+{
++++++++return+NO;
++++}
}

#pragma+mark+-+Swizzle+-[UITextInput+selectionDidChange:]

//+Swizzle+selectionDidChange:+to+"do+whatever+you+want"+when+the+text+field's+selection+has+changed.
//+Only+call+this+method+on+the+main+(UI)+thread+because+it+may+not+be+thread+safe.
-+(void)swizzleSelectionDidChange:(BOOL)swizzle+{
++++if+(swizzle+==+swizzled+%7C%7C+![self+respondsToSelector:@selector(inputDelegate)])+return;+//+4.3

++++Class+inputDelegateClass+=+object_getClass(self.inputDelegate);
++++SEL+mySelector+=+@selector(mySelectionDidChange:);
++++class_addMethod(inputDelegateClass,+mySelector,+(IMP)mySelectionDidChange,+"v@:@");
++++Method+myMethod++++=+class_getInstanceMethod(inputDelegateClass,+mySelector);
++++Method+uiKitMethod+=+class_getInstanceMethod(inputDelegateClass,+@selector(selectionDidChange:));
++++method_exchangeImplementations(uiKitMethod,+myMethod);
++++swizzled+=+swizzle;
++++//+NSLog(@"swizzled?+%25i",+method_getImplementation(uiKitMethod)+==+(IMP)venmo_selectionDidChange);
}

@end

UIKIT_STATIC_INLINE+void+mySelectionDidChange(id+self,+SEL+_cmd,+id<UITextInput>+textInput)+{
++++//+Call+the+native+implementation+of+selectionDidChange:.
++++[self+performSelector:@selector(mySelectionDidChange:)+withObject:textInput];

++++//+"Do+whatever+you+want"+with+the+selectedText+below.
++++NSString+*selectedText+=+[textInput+textInRange:textInput.selectedTextRange];
++++NSLog(@"selectedText:+%25@",+selectedText);++++++++
}|976151|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UITextField_Class/Reference/UITextField.html|1|http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UITextInput_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UITextInput|2|http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UITextView_Class/Reference/UITextView.html|3|http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UITextViewDelegate_Protocol/Reference/UITextViewDelegate.html#//apple_ref/occ/intfm/UITextViewDelegate/textViewDidChangeSelection%253a|4|http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UITextInputDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UITextInputDelegate/selectionDidChange%253a^0|0|R|0|2|B|F|C|Y|B|1R|B|2F|M|38|B|3Q|A|42|C|2|B|0|Y|K|1|3Q|A|2|0|0|9|B|V|M|1I|D|0|0|0|1F|0|2|J|O|1D|25|S|35|B|43|B|4Y|N|5O|16|O|1D|3|5O|16|4|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]|$9|1M|A|1N|B|C]|$9|1O|A|1P|B|C]|$9|1Q|A|1R|B|C]|$9|1S|A|1T|B|C]|$9|1U|A|1V|B|C]]|D|@$9|1W|A|1X|1|1Y]|$9|1Z|A|20|1|21]|$9|22|A|23|1|24]]|E|$]]|$1|H|3|I|5|J|7|25|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|26|8|@$9|27|A|28|B|C]|$9|29|A|2A|B|C]|$9|2B|A|2C|B|C]]|D|@]|E|$]]|$1|O|3|P|5|J|7|2D|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|2E|8|@$9|2F|A|2G|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|2H|8|@$9|2I|A|2J|B|C]|$9|2K|A|2L|B|C]|$9|2M|A|2N|B|C]|$9|2O|A|2P|B|C]|$9|2Q|A|2R|B|C]|$9|2S|A|2T|B|C]|$9|2U|A|2V|B|C]]|D|@$9|2W|A|2X|1|2Y]|$9|2Z|A|30|1|31]]|E|$]]|$1|U|3|V|5|J|7|32|8|@]|D|@]|E|$K|L]]|$1|W|3|-4|5|6|7|33|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]|16|$5|Z|10|11|E|$12|17]]|18|$5|Z|10|11|E|$12|19]]|1A|$5|Z|10|11|E|$12|1B]]]]

<h3><code>-[UITextField selectedText]</code></h3>

<p>Although <a href="http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UITextField_Class/Reference/UITextField.html"><code>UITextField</code></a> doesn't have a <code>selectedText</code> method, it conforms to the <a href="http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UITextInput_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UITextInput"><code>UITextInput</code> protocol</a>. So, you can use the required properties &amp; methods of the <code>UITextInput</code> protocol to determine the <code>selectedText</code> of a <code>UITextField *textField</code> (or any object that conforms to the <code>UITextInput</code> protocol, such as a <a href="http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UITextView_Class/Reference/UITextView.html"><code>UITextView</code></a>).</p>

<pre><code>NSString *selectedText = [textField textInRange:textField.selectedTextRange];
NSLog(@"selectedText: %@", selectedText);
</code></pre>

<p>As an aside, you can also use the required properties &amp; methods of the <code>UITextInput</code> to calculate the <code>selectedRange</code> of a <code>UITextField *textField</code>.</p>

<pre><code>UITextRange *selectedTextRange = textField.selectedTextRange;
NSUInteger location = [textField offsetFromPosition:textField.beginningOfDocument
                                         toPosition:selectedTextRange.start];
NSUInteger length = [textField offsetFromPosition:selectedTextRange.start
                                       toPosition:selectedTextRange.end];
NSRange selectedRange = NSMakeRange(location, length);
NSLog(@"selectedRange: %@", NSStringFromRange(selectedRange));
</code></pre>

<h3><code>-[UITextFieldDelegate textFieldDidChangeSelection:]</code></h3>

<p>Although, <code>UITextFieldDelegate</code> doesn't declare a <code>textFieldDidChangeSelection:</code> delegate method like <a href="http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UITextViewDelegate_Protocol/Reference/UITextViewDelegate.html#//apple_ref/occ/intfm/UITextViewDelegate/textViewDidChangeSelection%3a"><code>-[UITextViewDelegate textViewDidChangeSelection:]</code></a>, you can still hook into when the selection of a <code>UITextField</code> has changed. To do so, subclass <code>UITextField</code> and use method swizzling to add your own code to the <code>textField.inputDelegate</code>'s native implementation of <a href="http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UITextInputDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UITextInputDelegate/selectionDidChange%3a"><code>-[UITextInputDelegate selectionDidChange:]</code></a>.</p>

<pre><code>// MyTextField.h

#import &lt;UIKit/UIKit.h&gt;

@interface MyTextField : UITextField

@end


// MyTextField.m

#import &lt;objc/runtime.h&gt;
#import "MyTextField.h"

UIKIT_STATIC_INLINE void mySelectionDidChange(id self, SEL _cmd, id&lt;UITextInput&gt; textInput);

@implementation MyTextField {
    BOOL swizzled;
}

#pragma mark - UIResponder

// Swizzle here because self.inputDelegate is set after becomeFirstResponder gets called.
- (BOOL)becomeFirstResponder {
    if ([super becomeFirstResponder]) {
        [self swizzleSelectionDidChange:YES];
        return YES;
    } else {
        return NO;
    }
}

// Unswizzle here because self.inputDelegate may become the inputDelegate for another UITextField.
- (BOOL)resignFirstResponder {
    if ([super resignFirstResponder]) {
        [self swizzleSelectionDidChange:NO];
        return YES;
    } else {
        return NO;
    }
}

#pragma mark - Swizzle -[UITextInput selectionDidChange:]

// Swizzle selectionDidChange: to "do whatever you want" when the text field's selection has changed.
// Only call this method on the main (UI) thread because it may not be thread safe.
- (void)swizzleSelectionDidChange:(BOOL)swizzle {
    if (swizzle == swizzled || ![self respondsToSelector:@selector(inputDelegate)]) return; // 4.3

    Class inputDelegateClass = object_getClass(self.inputDelegate);
    SEL mySelector = @selector(mySelectionDidChange:);
    class_addMethod(inputDelegateClass, mySelector, (IMP)mySelectionDidChange, "v@:@");
    Method myMethod    = class_getInstanceMethod(inputDelegateClass, mySelector);
    Method uiKitMethod = class_getInstanceMethod(inputDelegateClass, @selector(selectionDidChange:));
    method_exchangeImplementations(uiKitMethod, myMethod);
    swizzled = swizzle;
    // NSLog(@"swizzled? %i", method_getImplementation(uiKitMethod) == (IMP)venmo_selectionDidChange);
}

@end

UIKIT_STATIC_INLINE void mySelectionDidChange(id self, SEL _cmd, id&lt;UITextInput&gt; textInput) {
    // Call the native implementation of selectionDidChange:.
    [self performSelector:@selector(mySelectionDidChange:) withObject:textInput];

    // "Do whatever you want" with the selectedText below.
    NSString *selectedText = [textInput textInRange:textInput.selectedTextRange];
    NSLog(@"selectedText: %@", selectedText);        
}
</code></pre>


blocks|key|760658|text|斯威夫特|type|unstyled|depth|inlineStyleRanges|entityRanges|data|760659|在Swift中，从UITextField中获取所选文本的过程如下：|offset|length|style|CODE|760660|if+let+textRange+=+myTextField.selectedTextRange+{

++++let+selectedText+=+myTextField.textInRange(textRange)
++++
}|code-block|syntax|javascript|760661|其中，textRange是用于获取实际选定文本的UITextRange。|760662|entityMap^0|0|9|B|0|0|3|9|O|B|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|V|8|@$D|W|E|X|F|G]|$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|P|$]]

<h1>Swift</h1>
<p>In Swift, getting the selected text from a <code>UITextField</code> is done like this:</p>
<pre><code>if let textRange = myTextField.selectedTextRange {

    let selectedText = myTextField.textInRange(textRange)
    
}
</code></pre>
<p>where <code>textRange</code> is a <code>UITextRange</code> that is used to get the actual selected text.</p>


blocks|key|760700|text|UITextField没有委托来更改选择范围。我们可以使用KVO来观察UITextfield的selectedTextRange性质。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|760701|++++[textField+addObserver:self+forKeyPath:@"selectedTextRange"+options:NSKeyValueObservingOptionNew+context:NULL];|code-block|syntax|javascript|760702|或者创建UITextField子类并覆盖setSelectedTextRange方法。|760703|entityMap^0|Z|B|1B|H|0|0|4|B|K|K|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|N|$]]

<p>UITextField don't have delegate to get the selection range change. We can use KVO to observe <code>selectedTextRange</code> property of <code>UITextfield</code>.</p>

<pre><code>    [textField addObserver:self forKeyPath:@"selectedTextRange" options:NSKeyValueObservingOptionNew context:NULL];
</code></pre>

<p>Or create <code>UITextField</code> subclass and override <code>setSelectedTextRange</code> method.</p>


<p>I am working on Text to speech application in iPhone,</p>

<p>in which have a text field that takes input, i want user to select some portion of text from text field and my application will convert that selected text into speech.</p>

<p>my problem is how would i get the text that user has selected from text field?</p>


how to get selected text from uitextfield in iphone?

Swift

我正在用iPhone开发文本到语音的应用程序，其中有一个接受输入文本字段，我希望用户从文本字段中选择文本的某一部分，我的应用程序将把所选文本转换为语音。我的问题是如何从文本字段中获取用户选择的文本？

问如何从iphone的uitextfield中获取选定的文本？
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问如何从iphone的uitextfield中获取选定的文本？
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