I received an nsstring from the server. Now I want to split it into the substring I need. How to split the string?
我从服务器收到一个nsstring。现在我想把它分割成我需要的子字符串。如何分割绳子?
For example:
例如:
substring1:read from the second character to 5th character
substring1:从第二个字符读到第五个字符
substring2:read 10 characters from the 6th character.
substring2:从第6个字符中读取10个字符。
3 个解决方案
#1
213
You can also split a string by a substring, using NString's componentsSeparatedByString method.
您还可以使用NString的componentsseparation bystring方法通过子字符串来分割字符串。
Example from documentation:
文档的例子:
NSString *list = @"Norman, Stanley, Fletcher";
NSArray *listItems = [list componentsSeparatedByString:@", "];
#2
38
NSString has a few methods for this:
NSString对此有一些方法:
[myString substringToIndex:index];
[myString substringFromIndex:index];
[myString substringWithRange:range];
Check the documentation for NSString for more information.
查看NSString的文档以获得更多信息。
#3
0
I wrote a little method to split strings in a specified amount of parts. Note that it only supports single separator characters. But I think it is an efficient way to split a NSString.
我编写了一个小方法来在指定数量的部分中拆分字符串。注意,它只支持单个分隔符。但我认为这是分割NSString的有效方法。
//split string into given number of parts
-(NSArray*)splitString:(NSString*)string withDelimiter:(NSString*)delimiter inParts:(int)parts{
NSMutableArray* array = [NSMutableArray array];
NSUInteger len = [string length];
unichar buffer[len+1];
//put separator in buffer
unichar separator[1];
[delimiter getCharacters:separator range:NSMakeRange(0, 1)];
[string getCharacters:buffer range:NSMakeRange(0, len)];
int startPosition = 0;
int length = 0;
for(int i = 0; i < len; i++) {
//if array is parts-1 and the character was found add it to array
if (buffer[i]==separator[0] && array.count < parts-1) {
if (length>0) {
[array addObject:[string substringWithRange:NSMakeRange(startPosition, length)]];
}
startPosition += length+1;
length = 0;
if (array.count >= parts-1) {
break;
}
}else{
length++;
}
}
//add the last part of the string to the array
[array addObject:[string substringFromIndex:startPosition]];
return array;
}
#1
213
You can also split a string by a substring, using NString's componentsSeparatedByString method.
您还可以使用NString的componentsseparation bystring方法通过子字符串来分割字符串。
Example from documentation:
文档的例子:
NSString *list = @"Norman, Stanley, Fletcher";
NSArray *listItems = [list componentsSeparatedByString:@", "];
#2
38
NSString has a few methods for this:
NSString对此有一些方法:
[myString substringToIndex:index];
[myString substringFromIndex:index];
[myString substringWithRange:range];
Check the documentation for NSString for more information.
查看NSString的文档以获得更多信息。
#3
0
I wrote a little method to split strings in a specified amount of parts. Note that it only supports single separator characters. But I think it is an efficient way to split a NSString.
我编写了一个小方法来在指定数量的部分中拆分字符串。注意,它只支持单个分隔符。但我认为这是分割NSString的有效方法。
//split string into given number of parts
-(NSArray*)splitString:(NSString*)string withDelimiter:(NSString*)delimiter inParts:(int)parts{
NSMutableArray* array = [NSMutableArray array];
NSUInteger len = [string length];
unichar buffer[len+1];
//put separator in buffer
unichar separator[1];
[delimiter getCharacters:separator range:NSMakeRange(0, 1)];
[string getCharacters:buffer range:NSMakeRange(0, len)];
int startPosition = 0;
int length = 0;
for(int i = 0; i < len; i++) {
//if array is parts-1 and the character was found add it to array
if (buffer[i]==separator[0] && array.count < parts-1) {
if (length>0) {
[array addObject:[string substringWithRange:NSMakeRange(startPosition, length)]];
}
startPosition += length+1;
length = 0;
if (array.count >= parts-1) {
break;
}
}else{
length++;
}
}
//add the last part of the string to the array
[array addObject:[string substringFromIndex:startPosition]];
return array;
}