Question

我有3个NSString和1个NSArray值，我尝试将所有字符串转换为一个：

string01 = [string01 stringByAppendingString:[numbersValue objectAtIndex:Value1 -1]];
string03 = [string02 stringByAppendingString:[numbersValue objectAtIndex:Value2 -1]];
string03 = [string03 stringByAppendingString:[numbersValue objectAtIndex:Value3 -1]];

//here i will to convert value of striing01 in to string02 and string02 in to string03 than take last string in my UITextView

resulteString = [resulteString stringByAppendingString:<what i can write here?>];

[myTextView setText:resulteString];

就像一个Enigma机器，例如，如果你想一个键盘并按下A，

A pass inside a string01 and become B,
B pass inside a string02 and become C,
C pass inside string03 and become D
in my text view i need to see only D

Answer 1

如果resulteString是NSString类的对象然后使用

resultString = [NSString stringWithFormat:@"%@%@%@%@", resultString,string01, string02, string03];

否则，如果resulteString是NSMutableString类的对象

   resulteString = [resulteString stringByAppendingFormat:@"%@%@%@", string01, string02, string03];

可以帮到你。

Answer 2

我明白你的意思。如果你想通过移动加密你的字符串，你需要一个像这样的方法：

//Edit this method how you want to use this is just an example
-(NSString *) encodeString:(NSString *) realString{
    NSArray *alphabet=[NSArray arrayWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"J",@"K",@"L",@"M",@"N",@"O",@"P",@"R",@"S",@"T",@"U",@"V",@"W",@"Y",@"Z",nil];
    int index=[alphabet indexOfObject:realString];
    index ++;
    NSString *resultString=[alphabet objectAtIndex:index];
    return resultString;

}

你需要逐个角色。使用UITextField的委托每次你点击键盘，调用这个方法，你会得到新的字符串。并且每次都将此字符串附加到另一个字符串。

希望它有效。

Answer 3

使用此功能

[NSArray componentsJoinedByString]

Answer 4

您可以使用如下

First write
in YourController.h file NSString *newString;

// Add below line in viewDidLoad
newString = @""; 
// In Your function
// A pressed from keyboard
NSString *str1 = @"Newly pressed Keyboard Key";  
// Add New Pressed key with existing one
newString = [NSString stringWithFormat:@"%@ %@",newString,str1];

这样你可以在一个函数中添加它，并在用户从键盘按任意键时调用。

希望这会对你有所帮助。

将NSString与其他NSString一起转换

4 个答案: