iphone - 应用程序在发送和接收特殊字符时崩溃

Question

我正在创建一个聊天应用程序。但是，现在我在发送特殊字符“&”时遇到一个问题。我正在使用 php Web 服务发送和接收消息。在发送“&”字符时，之后当有人收到此字符时，应用程序崩溃。

Answer 1

在这里用下面的代码替换该字符...

当将其传递到网络服务时，请像下面这样替换它..

yourString = [yourString stringByReplacingOccurrencesOfString:@"&" withString:@"&"];

然后当你想接收它的时候用特殊字符替换..

    yourString = [yourString stringByReplacingOccurrencesOfString:@"&" withString:@"&"];

在 UITextView 或 UITextField 中显示后

更新:

if (string2 != nil) {
   string1 = [NSString stringWithString:string2];
   NSString *strTemp = [NSString stringWithString:string2];
   NSLog(@"\n\n Temp String ==>> %@",strTemp);
}

更新:

 NSString *yourString = @"Hello & How Are You?";
 yourString = [yourString stringByReplacingOccurrencesOfString:@"&" withString:@"&"];
NSLog(@"\n\n String Here => %@",yourString);

在将字符串发送到网络服务器时，请使用以下字符串..

NSString *yourStringForWeb = @"Hello & How Are You?";
 yourStringForWeb = [yourStringForWeb stringByReplacingOccurrencesOfString:@"&" withString:@"&"];

并将此 yourStringForWeb 传递给网络服务...

NSString *string = @"Hello & How Are You?";

string = [string stringByReplacingOccurrencesOfString:@"&" withString:@"&"];
string = [string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
string = [string stringByReplacingOccurrencesOfString:@"&" withString:@"%26"];
NSLog(@"\n\n ===>> Before ==>> %@",string);

NSString *string2 = string;

string2 = [string2 stringByReplacingOccurrencesOfString:@"%20" withString:@" "];
string2 = [string2 stringByReplacingOccurrencesOfString:@"%26" withString:@"&"];
NSLog(@"\n\n ===>> After ==>> %@",string2);

输出=>

 ===>> Before ==>> Hello%20%26%20How%20Are%20You?
 ===>> After ==>> Hello & How Are You?