与其他NSString转换NSString

Question

我有3个NSString和1个带值的NSArray，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];

就像一个谜机器，例如，如果你想一个键盘，然后按下A键，

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，则使用

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

如果resulteString是NSMutableString类的对象，则返回

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

可能会对你有帮助。

Answer 2

我明白你说的了。如果你想通过移位来加密你的字符串，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;

}

您需要逐个字符地执行此操作。每次单击键盘时使用UITextField的委托，调用此方法，您将获得新的字符串。并且每次都将这个字符串附加到另一个字符串。

希望它能起作用。

Answer 3

使用此函数

[NSArray componentsJoinedByString]