寫入TextView疊加先前寫入

Question

我有一個在IB創建的TextView ...我有兩個「段落」我想寫，似乎工作，除了第二次寫入覆蓋第一個。

我該如何解決這個問題？

第一次寫：

resultText.text =[NSString stringWithFormat:@"Decode Data: %@, \n%@\n\n",symbol.data, symbol.typeName]; // display it... 

第二寫：

resultText.text = [NSString stringWithFormat:@"\nDatabase: \n%@ \n%@ \n%@", 
     [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)], 
     [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)], 
     [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]]; 

Answer 1

它看起來對我來說，你只是分配文字的兩倍，而不是追加。解決這個問題的簡單方法是將您的第二次寫入更改爲：

resultText.text = [NSString stringWithFormat:@"%@\nDatabase: \n%@ \n%@ \n%@", 
    resultText.text, 
    [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)], 
    [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)], 
    [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]]; 

這將保留您在那裏的先前文本。

編輯：

resultText.text =[NSString stringWithFormat:@"Decode Data: %@, %@",symbol.data, symbol.typeName]; 

resultText.text = [NSString stringWithFormat:@"%@\nDatabase: %@, %@, %@", 
    resultText.text, 
    [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)], 
    [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)], 
    [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]];