iOS中动态计算字符串的长度

//新建字符串

NSString *text =@"这个是测试数据";

//计算文本文字size

CGSize size = [text sizeWithAttributes:@{NSFontAttributeName: [UIFont systemFontOfSize:18.0f]}];

//获取宽高

CGSize statuseStrSize = CGSizeMake(ceilf(size.width), ceilf(size.height));

//打印宽高

NSLog(@"%@_width:%f_height:%f",NSStringFromCGSize(statuseStrSize),size.width,size.height);