转载自：https://willern.gitee.io/2021/01/27/20210127/
- 准备HTML代码
<div style="position: fixed;top: 0;left: 0;">
<div *ngFor="let item of watermarkList" class="watermarkList">
<div [ngStyle]="item.objStyle">
{{item.txt}}
</div>
</div>
</div>
- TS代码
// 页面水印
watermarkList = [];
watermark(settings) {
//默认设置
let defaultSettings = {
watermark_txt: "text",
watermark_x: 20,//水印起始位置x轴坐标
watermark_y: 20,//水印起始位置Y轴坐标
watermark_rows: 20,//水印行数
watermark_cols: 20,//水印列数
watermark_x_space: 150,//水印x轴间隔
watermark_y_space: 100,//水印y轴间隔
watermark_color: '#000000',//水印字体颜色
watermark_alpha: 0.15,//水印透明度
watermark_fontsize: '18px',//水印字体大小
watermark_font: '微软雅黑',//水印字体
watermark_width: 300,//水印宽度
watermark_height: 100,//水印长度
watermark_angle: 15,//水印倾斜度数
};
//采用配置项替换默认值，作用类似jquery.extend
if (arguments.length === 1 && typeof arguments[0] === "object") {
var src = arguments[0] || {};
for (let key in src) {
if (src[key] && defaultSettings[key] && src[key] === defaultSettings[key])
continue;
else if (src[key])
defaultSettings[key] = src[key];
}
}
var resList = [];
var page_width = document.body.offsetWidth;
var page_height = document.body.offsetHeight;
//如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔
if (defaultSettings.watermark_cols === 0 || (defaultSettings.watermark_x + defaultSettings.watermark_width * defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1) > page_width)) {
defaultSettings.watermark_cols = (page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space);
defaultSettings.watermark_x_space = (page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1);
}
//如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔
if (defaultSettings.watermark_rows == 0 ||
(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height) {
defaultSettings.watermark_rows = (defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space);
defaultSettings.watermark_y_space = (page_height - defaultSettings.watermark_y - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1);
}
var x;
var y;
for (var i = 0; i < defaultSettings.watermark_rows; i++) {
y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
for (var j = 0; j < defaultSettings.watermark_cols; j++) {
x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;
var mask_div = {
style: "",
txt: "",
};
mask_div.txt = defaultSettings.watermark_txt;
//设置水印div倾斜显示
mask_div.style = JSON.stringify({
'pointer-events': 'none',
'-webkit-transform': 'rotate(-' + defaultSettings.watermark_angle + 'deg)',
'-moz-transform': 'rotate(-' + defaultSettings.watermark_angle + 'deg)',
'-ms-transform': 'rotate(-' + defaultSettings.watermark_angle + 'deg)',
'-o-transform': 'rotate(-' + defaultSettings.watermark_angle + 'deg)',
'transform': 'rotate(-' + defaultSettings.watermark_angle + 'deg)',
'position': 'absolute',
'left': x + 'px',
'top': y + 'px',
'overflow': 'hidden',
'z-index': '99999',
'opacity': defaultSettings.watermark_alpha,
'font-size': defaultSettings.watermark_fontsize,
'font-family': defaultSettings.watermark_font,
'color': defaultSettings.watermark_color,
'text-align': 'center',
'width': defaultSettings.watermark_width + 'px',
'height': defaultSettings.watermark_height + 'px',
'display': 'block',
});
resList = resList.concat(mask_div);
}
}
return resList;
}
- 页面初始化时调用方法
//初始化
setTimeout(() => {
setInterval(()=>{
let text1 = { watermark_txt: 'Unapproved', watermark_fontsize: '16px'};
this.watermarkList = this.watermark(text1);
for(let item of this.watermarkList){
let style = JSON.parse(item.style);
// json字符串转换为json对象，因为ngStyle只支持对象
item.objStyle = style;
}
},1000)
}, 1000);
-
效果
image.png
亲测可用，可用参考实现
转载自：https://willern.gitee.io/2021/01/27/20210127/
