如何添加間距在

Question

之間的字符串通過使用appendString方法得到了我的第一個字符串和第二個字符串，結果將是AB。我想在兩者之間給出一個空缺來顯示爲A, B。

scanPackage = [NSString stringWithFormat:@"%@", result.text]; 

NSMutableString *string = [NSMutableString stringWithString:savedString]; 
[string appendString:scanPackage]; 

//Saved into memory 
NSUserDefaults *preferences = [NSUserDefaults standardUserDefaults]; 
[preferences setObject:string forKey:@"scanResult"]; 

Answer 1

陣列可以不用操縱字符串，可以在陣列中添加更多的結合：

NSString *combined = [@[savedString, scanPackage] componentsJoinedByString:@", "]; 

Answer 2

可以使用NSString功能stringByAppendingFormat:。嘗試這個。

scanPackage = [NSString stringWithFormat:@"%@", result.text]; 
NSString *string = [savedString stringByAppendingFormat:@", %@",scanPackage]; 
//Saved into memory 
NSUserDefaults *preferences = [NSUserDefaults standardUserDefaults]; 
[preferences setObject:string forKey:@"scanResult"];