我是一个来自Objective-C的java人。在java中,要将变量添加到字符串中,您必须执行以下操作:
someString = "This string is equal to " + someNumber + ".";
我无法弄清楚如何在Objective-C中做到这一点。我有一个NSMutableString
,我想添加到字符串的中间。我该怎么做呢?
我试过了:
NSString *someText = @"Lorem ipsum " + someMutableString;
NSString *someText = @"Lorem ipsum " + [someMutableString stringForm];
以及其他一些事情,似乎都没有效果。同时将+
与,
s互换。
答案 0 :(得分:29)
您可以使用appendString:
,但一般来说,我更喜欢:
NSString *someText = [NSString stringWithFormat: @"Lorem ipsum %@", someMutableString];
NSString *someString = [NSString stringWithFormat: @"This is string is equal to %d.", someInt];
NSString *someOtherString = [NSString stringWithFormat: @"This is string is equal to %@.", someNSNumber];
或者,或者:
NSString *someOtherString = [NSString stringWithFormat: @"This is string is equal to %d.", [someNSNumber intValue]];
等等......
这些字符串是自动释放的,因此请注意不要失去它们的价值。如有必要,请保留或复制它们,稍后自行释放。
答案 1 :(得分:9)
试试这个:
NSMutableString * string1 = [[NSMutableString alloc] initWithString:@"this is my string"];
[string1 appendString:@" with more strings attached"];
//release when done
[string1 release];
答案 2 :(得分:6)
您需要使用stringByAppendingString
NSString* string = [[NSString alloc] initWithString:@"some string"];
string = [string stringByAppendingString:@" Sweet!"];
当你完成任务时,不要忘记[string release];
。
答案 3 :(得分:0)
NSMutableString *string = [[NSMutableString alloc] init];
[string appendFormat:@"more text %@", object ];