ios 移除html标签,ios - Remove HTML Tags from an NSString on the iPhone - Stack Overflow

I have following the accepted answer by m.kocikowski and modified is slightly to make use of an autoreleasepool to cleanup all of the temporary strings that are created by stringByReplacingCharactersInRange

In the comment for this method it states, /* Replace characters in range with the specified string, returning new string.

*/

So, depending on the length of your XML you may be creating a huge pile of new autorelease strings which are not cleaned up until the end of the next @autoreleasepool. If you are unsure when that may happen or if a user action could repeatedly trigger many calls to this method before then you can just wrap this up in an @autoreleasepool. These can even be nested and used within loops where possible.

Apple's reference on @autoreleasepool states this... "If you write a loop that creates many temporary objects. You may use an autorelease pool block inside the loop to dispose of those objects before the next iteration. Using an autorelease pool block in the loop helps to reduce the maximum memory footprint of the application." I have not used it in the loop, but at least this method cleans up after itself now.

- (NSString *) stringByStrippingHTML {

NSString *retVal;

@autoreleasepool {

NSRange r;

NSString *s = [[self copy] autorelease];

while ((r = [s rangeOfString:@"]+>" options:NSRegularExpressionSearch]).location != NSNotFound) {

s = [s stringByReplacingCharactersInRange:r withString:@""];

}

retVal = [s copy];

}

// pool is drained, release s and all temp

// strings created by stringByReplacingCharactersInRange

return retVal;

}