如何在viewWillDisappear上清除/清空粘贴板 [英] How to clear/empty pasteboard on viewWillDisappear

问题描述

我使用 UIPasteboard 在两个 UITextView 之间复制/粘贴文本。

代码如下：

   - （void）viewDidLoad {
 [super viewDidLoad]; 
 pasteBoard = [UIPasteboard generalPasteboard]; //它在.h中声明为UIPasteboard * pasteBoard; 
} 
 
  - （IBAction）doCopyBtn {
 if（！[toCopyTextView.text isEqualToString：@]）{
 pasteBoard.string = toCopyTextView.text; 
 NSLog（@pasteb1％@，pasteBoard.string）; 
} else {
 NSLog（@error！enter smth）; 
} 
} 
 
  - （IBAction）doPasteBtn {
 if（！[pasteBoard.string isEqualToString：@]）{
 toPasteTextView.text = pasteBoard.string 
 NSLog（@pasteb2％@，pasteBoard.string）; 
} else {
 NSLog（@error！enter smth）; 
} 
} 
  

c $ c> pasteb2（null））

   - （void）viewWillDisappear：（BOOL）animated {
 [super viewWillDisappear：animated]; 
 [pasteBoard setString：@]; 
} 
  

解决方案

iOS - UIPasteboard

请尝试以下操作：

  UIPasteboard * pb = [UIPasteboard generalPasteboard]; 
 [pb setValue：@forPasteboardType：UIPasteboardNameGeneral]; 
 

Arab_Geek的回应是正确的但可用于Cocoa（我怀疑你正在寻找一个iOS解决方案） / p>


I use UIPasteboard to copy/paste text between two UITextView.

Code looks like this:

- (void)viewDidLoad {
   [super viewDidLoad];
   pasteBoard = [UIPasteboard generalPasteboard]; //it is declared in .h as UIPasteboard *pasteBoard;
}

-(IBAction)doCopyBtn {
    if (![toCopyTextView.text isEqualToString:@""]){
        pasteBoard.string = toCopyTextView.text;
        NSLog(@"pasteb1 %@", pasteBoard.string);
    } else {
        NSLog (@"error! enter smth");
    }
}

-(IBAction)doPasteBtn {
    if (![pasteBoard.string isEqualToString:@""]){ 
        toPasteTextView.text = pasteBoard.string;
        NSLog(@"pasteb2 %@", pasteBoard.string);
    } else {
        NSLog (@"error! enter smth");
    }
}

And even this cant help (NSLog returns: pasteb2 (null))

-(void) viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [pasteBoard setString:@""]; 
}

解决方案

iOS – UIPasteboard

Try the following:

    UIPasteboard *pb = [UIPasteboard generalPasteboard];
    [pb setValue:@"" forPasteboardType:UIPasteboardNameGeneral];

Arab_Geek's response is correct but available for Cocoa (and I suspect you are looking for an iOS solution)

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