利用分类,NSString,增加一个方法。
#import <Foundation/Foundation.h> #import <UIKit/UIKit.h> @interface NSString (Height) + (CGSize)getRect:(NSString *)textStr andWidth:(CGSize)size andFont:(UIFont *)font; @end
#import "NSString+Height.h" @implementation NSString (Height) + (CGSize)getRect:(NSString *)textStr andWidth:(CGSize)size andFont:(UIFont *)font { CGRect rect = [textStr boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:font} context:nil]; return rect.size; } @end
使用:
CGSize size = [NSString getRect:str andWidth:CGSizeMake(IOS_SCREEN.size.width/2 - 10, CGFLOAT_MAX) andFont:[UIFont systemFontOfSize:14]];
其中:
str 是将要计算的字符串,
IOS_SCREEN.size.width/2 - 10 是宽度,
[UIFont systemFontOfSize:14]是设置字号
这些需要自己根据情况写;