标签:style blog class c code ext
从谷歌地图接口取回数据包含回车换行符号,由于需要须把空格和换行符去掉,正常来说应该把字符串内的\n替换就可以了,后来试了一下不行。百度了一下,有人说换行应该是\r\n,也有人说需要换成\\n,众说纷纭,全部试过均告失败:
NSString *temp = [[NSString alloc]initWithData:xmlData encoding:NSUTF8StringEncoding]; [temp stringByReplacingOccurrencesOfString:@"\n" withString:@""]; [temp stringByReplacingOccurrencesOfString:@"\\n" withString:@""]; [temp stringByReplacingOccurrencesOfString:@"\r\n" withString:@""]; [temp stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@""]; [temp stringByReplacingOccurrencesOfString:@"\r" withString:@""]; [temp stringByReplacingOccurrencesOfString:@"\\r" withString:@""]; [temp stringByReplacingOccurrencesOfString:@"\t" withString:@""];
经过一番折腾,终于找到了以下方法:
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // Strange New lines: // Next Line, U+0085 // Form Feed, U+000C // Line Separator, U+2028 // Paragraph Separator, U+2029 // Scanner NSScanner *scanner = [[NSScanner alloc] initWithString:content]; [scanner setCharactersToBeSkipped:nil]; NSMutableString *result = [[NSMutableString alloc] init]; NSString *temp; NSCharacterSet*newLineAndWhitespaceCharacters = [ NSCharacterSet newlineCharacterSet]; // Scan while (![scanner isAtEnd]) { // Get non new line or whitespace characters temp = nil; [scanner scanUpToCharactersFromSet:newLineAndWhitespaceCharacters intoString:&temp]; if (temp) [result appendString:temp]; // Replace with a space if ([scanner scanCharactersFromSet:newLineAndWhitespaceCharacters intoString:NULL]) { if (result.length > 0 && ![scanner isAtEnd]) // Dont append space to beginning or end of result [result appendString:@" "]; } } // Cleanup [scanner release]; // Return NSString *retString = [[NSString stringWithString:result] retain]; [result release]; // Drain [pool drain];
ps:有知道\n等方法无法替换的朋友,希望可以明示一下。
NSString去掉空格和换行失败,布布扣,bubuko.com
标签:style blog class c code ext
原文地址:http://blog.csdn.net/lvxiangan/article/details/26367527