我有Ionic 3应用程序,并将其更新为IONIC 4。因此,当我使用适用于iOS 12的xcode 10编译应用程序时,谷歌地图折线不会呈现并抛出错误。对于IONIC 3和ios 11.3,它的渲染效果非常好,但是在更新后,它不再显示: 我的代码是:
for (const path of dashedlinePaths) {
const lineSymbol = {
path: 'M 0,-1 0,1',
strokeOpacity: 1,
scale: 4
};
let dashedPath = new google.maps.Polyline({
path: path,
geodesic: true,
strokeOpacity: 0,
strokeColor: '#ff883c',
icons: [{
icon: lineSymbol,
offset: '0',
repeat: '20px'
}]
});
dashedPath.setMap(this.googleMap);
}
for (const path of linePaths) {
let linePath = new google.maps.Polyline({
path: path,
geodesic: true,
strokeColor: '#ff883c',
strokeOpacity: 1.0,
strokeWeight: 4
});
linePath.setMap(this.googleMap);
}
错误显示如下:
TypeError: null is not an object (evaluating 'e.lineJoin="round"')
runTask — polyfills.js:3880
invokeTask — polyfills.js:4017
n — polyfills.js:3457
runTask — polyfills.js:3880
它还显示警告,如:
Total canvas memory use exceeds the maximum limit (224 MB).lW — poly.js:52:321
此外,当我尝试缩放地图时出现错误:
TypeError: null is not an object (evaluating 'a.scale')
runTask — polyfills.js:3880
invokeTask — polyfills.js:4017
n — polyfills.js:3457
runTask — polyfills.js:3880
答案 0 :(得分:1)
这是iOS Safari上的Google Maps JS SDK中的错误。
已被Google确认,这是为此创建的两张票,一张甚至包含一个提琴,解释了如何复制它。