在Objective-C中有没有(stringByAppendingString:)字符串连接的快捷方式，或者一般使用NSString的快捷方式?
例如，我想做:
NSString *myString = @"This";
NSString *test = [myString stringByAppendingString:@" is just a test"];
更像是:
string myString = "This";
string test = myString + " is just a test";
当前回答
NSString *result=[NSString stringWithFormat:@"%@ %@", @"Hello", @"World"];
其他回答
这样使用stringByAppendingString:
NSString *string1, *string2, *result;
string1 = @"This is ";
string2 = @"my string.";
result = [result stringByAppendingString:string1];
result = [result stringByAppendingString:string2];
OR
result = [result stringByAppendingString:@"This is "];
result = [result stringByAppendingString:@"my string."];
尝试stringWithFormat:
NSString *myString = [NSString stringWithFormat:@"%@ %@ %@ %d", "The", "Answer", "Is", 42];
我试过这个代码。这对我很有效。
NSMutableString * myString=[[NSMutableString alloc]init];
myString=[myString stringByAppendingString:@"first value"];
myString=[myString stringByAppendingString:@"second string"];
当为web服务构建请求时，我发现像下面这样做非常容易，并且在Xcode中使连接可读:
NSString* postBody = {
@"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
@"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
@" <soap:Body>"
@" <WebServiceMethod xmlns=\"\">"
@" <parameter>test</parameter>"
@" </WebServiceMethod>"
@" </soap:Body>"
@"</soap:Envelope>"
};
使c = [a stringByAppendingString: b]更短的唯一方法是在st点附近使用自动补全。+运算符是C的一部分，它不知道Objective-C对象。
