NSString转NSUrl：NSString *str = @"www.ngmob.com";
NSURL *URL = [NSURL URLWithString:str];
NSUrl转NSString：NSString *str1 = [URL absoluteString];
NSString转NSUrl：NSString *str = @"www.ngmob.com";
NSURL *URL = [NSURL URLWithString:str];
NSUrl转NSString：NSString *str1 = [URL absoluteString];
本文标题：iOS 中 NSUrl和NSString的相互转化
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