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我試圖在我的應用程序中打開一個PDF文件，我正在用Ionic構建。我明白我可以使用inAppBrowser來做到這一點。如何在Cordova/Ionic應用程序中打開PDF文件？
我首先從api端點獲取PDF，然後將其寫入文件系統。一旦寫入文件系統，我想使用inAppBrowser打開它。我現在的代碼如下：
$http.get(window.apiUrl + '/doc/54bfcc7b879c686969d2bbfe')
.success(function(data){
console.log('PDF GOTTEN SUCCESFULLY. NOW WRITE IT TO A FILE.');
$cordovaFile.writeFile('ticket.pdf', data, true)
.then(function (success) {
console.log('PDF WAS WRITTEN TO THE FILE SYSTEM');
console.log(JSON.stringify(success));
$cordovaFile.readAsText('ticket.pdf')
.then(function (data) {
console.log('PDF COULD BE READ FROM THE SYSTEM');
window.open('cdvfile://localhost/persistent/ticket.pdf', '_system', 'location=no');
console.log('AFTER OPENING THE PDF');
}, function (error) {
console.log(JSON.stringify(error));
});
}, function (error) {
console.log(JSON.stringify(error));
});
})
.error(function(error){
console.log('IMAGE GET FAILURE.');
});
我在控制檯中沒有任何錯誤，但屏幕上沒有任何反應。我在看的console.log輸出如下：
file:///android_asset/www/js/controllers.js: Line 104 : PDF GOTTEN SUCCESFULLY. NOW WRITE IT TO A FILE.
file:///android_asset/www/js/controllers.js: Line 110 : PDF WAS WRITTEN TO THE FILE SYSTEM
file:///android_asset/www/js/controllers.js: Line 111 : {"type":"writeend","bubbles":false,"cancelBubble":false,"cancelable":false,"lengthComputable":false,"loaded":0,"total":0,"target":{"fileName":"","length":598874,"localURL":"cdvfile://localhost/persistent/ticket.pdf","position":598874,"readyState":2,"result":null,"error":null,"onwritestart":null,"onprogress":null,"onwrite":null,"onabort":null,"onerror":null}}
file:///android_asset/www/js/controllers.js: Line 115 : PDF COULD BE READ FROM THE SYSTEM
file:///android_asset/www/js/controllers.js: Line 119 : AFTER OPENING THE PDF
正如你可以看到我硬編碼了傳票名稱（ticket.pdf），並在打開時它的路徑（cdvfile://localhost/persistent/ticket.pdf）。我從json success-output得到的文件路徑顯示在111行的輸出中（見上）。
有人知道爲什麼這不起作用嗎？歡迎所有提示！