判定字符是否为空

此方法只需传入字段，会以YES/NO的状态反馈。很严谨的判定方式

//判断是否为空

- (BOOL) isBlankString:(NSString *)string {

    if (string == nil || string == NULL) {

        return YES;

    }

    if ([string isKindOfClass:[NSNull class]]) {

        return YES;

    }

    if ([[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length]==0) {

        return YES;

    }

    return NO;

}

//字符串追加相同的字段

-(NSString*)padRight:(int)count {

    NSMutableString * str = [[NSMutableString alloc] init];

    for(inti=0; i

        [strappendString:@"*"];

    }

    returnstr;

}

转载自：Jaycee麦子 https://www.cnblogs.com/rglmuselily/p/6074502.html