iOS 拉伸图片

代码拉伸

    UIImage *image = [UIImage imageNamed:@"img"];

    // 设置端盖的值
    CGFloat top = image.size.height * 0.5;
    CGFloat left = image.size.width * 0.5;
    CGFloat bottom = image.size.height * 0.5;
    CGFloat right = image.size.width * 0.5;

    // 设置端盖的值
    UIEdgeInsets edgeInsets = UIEdgeInsetsMake(top, left, bottom, right);
    // 设置拉伸的模式
    UIImageResizingMode mode = UIImageResizingModeStretch;
    // 拉伸图片
    UIImage *newImage = [image resizableImageWithCapInsets:edgeInsets resizingMode:mode];
    // 设置按钮的背景图片
    self.imageView.image = newImage;

图片加代码

1.设置图片拉伸区域

WeChat75400313a4005eaec7657510a80fbd03.png
WeChat0c5430d152950909e9f945054a08398a.png

2.代码设置图片大小

    UIImage *image = [UIImage imageNamed:@"img"];
    // 设置按钮的背景图片
    self.imageView.image = image;
    
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    //最大宽度为300，最大高度为200
    CGSize size = [itemModel.name boundingRectWithSize:CGSizeMake(ScreenW - px_scale(40), 200) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:18] ,NSParagraphStyleAttributeName:paragraphStyle} context:nil].size;
   
    [self.imageView mas_remakeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(self.contentView.mas_top).offset(px_scale(66));
        make.centerX.mas_equalTo(self.contentView.mas_centerX).offset(0);
        make.width.mas_equalTo(@(size.width + px_scale(120)));
        make.height.equalTo(@(px_scale(68)));
    }];