iOS学习-字符串的删除替换

字符串的常用处理，删除，替换。记录一下，方便查找。

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- (void)viewDidLoad {
    [super viewDidLoad];
   
    NSString *str1 = @"<hello,wo  r d!>";
    //删除字符串两端的尖括号
    NSMutableString *mString = [NSMutableString stringWithString:str1];
    //第一个参数是要删除的字符的索引，第二个是从此位开始要删除的位数
    [mString deleteCharactersInRange:NSMakeRange(0, 1)];
    [mString deleteCharactersInRange:NSMakeRange(mString.length-1, 1)];
    NSLog(@"mString:%@",mString);
    
    //删除字符串中的空格
    NSString *str2 = [mString stringByReplacingOccurrencesOfString:@" " withString:@""];
    NSLog(@"str2:%@",str2);
    
    //同样的可以替换字符
    NSString *str3 = [str2 stringByReplacingOccurrencesOfString:@"," withString:@"好"];
    NSLog(@"str3:%@",str3);
    
    //替换某一位置的字符
    NSString *str4 = [str3 stringByReplacingCharactersInRange:NSMakeRange(0, 1) withString:@"哈哈"];
    NSLog(@"str4:%@",str4);
}

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