NSString+NSMutableString+NSValue+NSAraay用法汇总3

//扩展路径     NSString *Path = @"~/NSData.txt";     NSString *absolutePath = [Path stringByExpandingTildeInPath];     NSLog(@"absolutePath:%@",absolutePath);     NSLog(@"Path:%@",[absolutePath stringByAbbreviatingWithTildeInPath]);     //文件扩展名     NSString *Path = @"~/NSData.txt";     NSLog(@"Extension:%@",[Path pathExtension]);     /*******************************************************************************************      NSMutableString      *******************************************************************************************/        /*---------------给字符串分配容量----------------*/     //stringWithCapacity:     NSMutableString *String;     String = [NSMutableString stringWithCapacity:40];     /*---------------在已有字符串后面添加字符----------------*/        //appendString: and appendFormat:     NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];     //[String1 appendString:@", I will be adding some character"];     [String1 appendFormat:[NSString stringWithFormat:@", I will be adding some character"]];     NSLog(@"String1:%@",String1);     */     /*-------- 在已有字符串中按照所给出范围和长度删除字符------*/        /*      //deleteCharactersInRange:      NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];      [String1 deleteCharactersInRange:NSMakeRange(0, 5)];      NSLog(@"String1:%@",String1);      /*--------在已有字符串后面在所指定的位置中插入给出的字符串------*/     //-insertString: atIndex:     NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];     [String1 insertString:@"Hi! " atIndex:0];     NSLog(@"String1:%@",String1);     /*--------将已有的空符串换成其它的字符串------*/     //-setString:     NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];     [String1 setString:@"Hello Word!"];     NSLog(@"String1:%@",String1);     /*--------按照所给出的范围，和字符串替换的原有的字符------*/     //-setString:     NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];     [String1 replaceCharactersInRange:NSMakeRange(0, 4) withString:@"That"];     NSLog(@"String1:%@",String1);     /*-------------判断字符串内是否还包含别的字符串(前缀，后缀)-------------*/     //01： 检查字符串是否以另一个字符串开头- (BOOL) hasPrefix: (NSString *) aString;     NSString *String1 = @"NSStringInformation.txt";     [String1 hasPrefix:@"NSString"] = = 1 ?  NSLog(@"YES") : NSLog(@"NO");     [String1 hasSuffix:@".txt"] = = 1 ?  NSLog(@"YES") : NSLog(@"NO");     //02： 查找字符串某处是否包含其它字符串 - (NSRange) rangeOfString: (NSString *) aString，这一点前面在串中搜索子串用到过;