我是 iOS 开发的新手，我有下面这样的数据，我想删除所有空行，请告诉我要应用的模式:
我已经将模式用作 @"(\r\n)"并将其替换为 @""，但它不起作用。请帮我解决这个问题
#EXTINF:-1 tvg-name="seedocs" tvg-logo="RT",RT
http://rt.ashttp14.visionip.tv/live/rt-global-live-HD/playlist.m3u8
#EXTINF:-1 tvg-name="hsn" tvg-logo="hsn",HSN TV
rtsp://hsn.mpl.miisolutions.net:1935/hsn-live01/_definst_/mp4:420p500kB31
#EXTINF:-1 tvg-name="us" tvg-logo="us",USTwit
http://bglive-a.bitgravity.com/twit/live/high
#EXTINF:-1 tvg-name="ALJAZEERA" tvg-logo="aljazeera",Aljazeera
rtmp://aljazeeraflashlivefs.fplive.net/aljazeeraflashlive-live/aljazeera_eng_high
#EXTINF:-1 tvg-name="bbc" tvg-logo="bbc",BBC World News
#EXTINF:-1 tvg-name="vevo" tvg-logo="vevo",Vevo
http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch1/06/prog_index.m3u8
#EXTINF:-1 tvg-name="vevo2" tvg-logo="vevo2",Vevo 2
http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch3/06/prog_index.m3u8
#EXTINF:-1 tvg-name="1HD" tvg-logo="1HD",1HD
rtmp://109.239.142.62/live/livestream3
最佳答案
[\r\n]+
您可以改用它。请参阅演示。替换为 \n。
https://regex101.com/r/vV1wW6/26
NSString *string = @"Your multiline string";
NSError *error = nil;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[\r\n]+" options:NSRegularExpressionCaseInsensitive error:&error];
NSString *modifiedString = [regex stringByReplacingMatchesInString:string options:0 range:NSMakeRange(0, [string length]) withTemplate:@"\n"];
关于ios - 使用正则表达式删除空行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32691559/