iOS文字自适应 浅谈

 在开发项目中难免会遇到一个富文本,需要用到文字自适应. 下面的方法中我们可以很好的去解决这个问题

 .h

@interface UILabel (HCL)

+ (CGFloat)getHeightByWidth:(CGFloat)width title:(NSString *)title font:(UIFont*)font;

 

+ (CGFloat)getWidthWithTitle:(NSString *)title font:(UIFont *)font;

@end

 

@implementation UILabel (HCL)

+ (CGFloat)getHeightByWidth:(CGFloat)width title:(NSString *)title font:(UIFont *)font

{

    

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, width, 0)];

    label.text = title;

    label.font = font;

    label.numberOfLines = 0;

    [label sizeToFit];

    CGFloat height = label.frame.size.height;

    return height;

}

 

+ (CGFloat)getWidthWithTitle:(NSString *)title font:(UIFont *)font {

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 1000, 0)];

    label.text = title;

    label.font = font;

    [label sizeToFit];

    return label.frame.size.width;

}

@end

 

 在使用的时候:

 

   //标题

    UILabel * titleLabel = [[UILabel alloc] init];

    NSString * titleStr =@"走自己的路让别人说去吧,走自己的路让别人说去吧,走自己的路让别人说去吧";

    titleLabel.text = titleStr;

    //titleLabel.backgroundColor = [UIColor redColor];

    titleLabel.numberOfLines = 0;               ------>这句不能忘

    titleLabel.lineBreakMode = NSLineBreakByCharWrapping;

    titleLabel.textColor = [UIColor blackColor];

    titleLabel.font = [UIFont systemFontOfSize:16.0f];------>这句字体大小要跟下面对应

    [backgroundImageView addSubview:titleLabel];

 

 

[titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {

        make.left.mas_equalTo(self.view.mas_left).offset(40);

        make.right.mas_equalTo(self.view.mas_right).offset(-40);

        make.top.mas_equalTo(self.view.mas_top).offset(30);

        make.height.mas_equalTo([UILabel getHeightByWidth:WIDTH-60 title:titleStr font:[UIFont systemFontOfSize:16.0f]]);------>对应

    }];

 

 

   希望能对大家项目中有帮助.