NSMutableString 使用（四）

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NSMutableString 可变字符串的使用：

#import "MutableString.h"@implementation MutableString@synthesize _mutableString;-(void)showMutableString{    _mutableString = [[NSMutableString alloc] initWithCapacity:0];    NSLog(@"NSMutableString 地址：%p",&_mutableString);        //设置 字符串    [_mutableString setString:@"123"];    NSLog(@"NSMutableString 地址：%p",&_mutableString);            //追加字符串    [_mutableString appendString:@"456"];    NSLog(@"NSMutableString 地址：%p",&_mutableString);       NSLog(@"增加之前：%@",_mutableString);//123456    //替换字符串  NSMakeRange(NSUInteger location,length) location:位置，length:所替换长度    NSRange range = NSMakeRange(1,2);    [_mutableString replaceCharactersInRange:range withString:@"增加"];    NSLog(@"增加之后：%@",_mutableString);//1增加456        //插入字符串    [_mutableString insertString:@"插入" atIndex:4];    NSLog(@"插入数据后：%@",_mutableString);//1增加4插入56        //删除指定字符  从下标 6开始删除，删除长度为1    NSRange deleteRange = NSMakeRange(6, 1);    [_mutableString deleteCharactersInRange:deleteRange];    NSLog(@"删除数据后：%@",_mutableString);//1增加4插入6        //追加字符串    [_mutableString appendFormat:@"追加字符串%@%@%@",@"A",@"B",@"C"];    NSLog(@"追加字符串：%@",_mutableString);//1增加4插入6追加字符串ABC    }@end

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