OC-NSString去掉两边的空格，类似java中的trimNSString *str @abcdNSString *str2 [str stringByTri
OC-NSString去掉两边的空格，类似java中的trim
NSString *str = @" abcd ";NSString *str2 = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];NSLog(@"%@",str);NSLog(@"%@",str2);