Objective-C - 如何用'+'替換空格

Question

如何在句子中有空格時添加加號（+）？

例子：

Hello how are you doing 

我要的是：

Hello+how+are+you+doing 

Answer 1

嘗試：

NSString *str = @"Hello how are you doing"; 
str = [str stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 

Answer 2

嘗試從NSString類stringByReplacingOccurrencesOfString:withString:方法

Answer 3

你可以做什麼像這樣：

NSString *helloWorld = @"Hello How are you doing"; 
NSString *alteredString = [helloWorld stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 

stringByReplacingOccurrencesOfString:@" " withString:@"+"特別是你在這裏看到的。

祝你好運。

Answer 4

NSMutableString *nstring = [NSMutableString stringWithFormat:@"Hello how are you doing"]; 

    NSString *newString = [nstring stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 
    NSLog(@"%@",newString);