how to use variable i in place of '1.4'.i want to use variable i to zoom out and zoom in the webview.
[tp stringByEvaluatingJavaScriptFromString:@"document.body.style.zoom = '1.4';"];
Thanks in advance
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66answers:
4
+2
A:
You can use the NSString class method stringWithFormat:
[tp stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.style.zoom = '%f';", i];
Jacob Relkin
2010-09-02 18:04:26
If you use a `d` specifier, you'll lose the decimal point.
Shaggy Frog
2010-09-02 18:08:01
Right. I changed it to `%f`.
Jacob Relkin
2010-09-02 18:13:43
%f could well do something completely bogus, depending on the type used to declare i (for instance, as a double).
hotpaw2
2010-09-02 18:57:17
A:
You can create a string using stringWithFormat:.
Something like [tp stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.style.zoom = '%d'", i];
Aloha Silver
2010-09-02 18:06:54
I also didn't notice it was a float. It should be %f instead of %d.
Aloha Silver
2010-09-02 19:50:52
A:
To use stringWithFormat to create a string that you can pass to stringByEvaluatingJavaScriptFromString, you need to know the type of your scalar variable i.
If it's an int, use '%d'. If it's a float, use '%f'. If it's a double use '%lf'.
Or you could cast it to a certain type first:
[tp stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.style.zoom = '%lf';", (double)i];
hotpaw2
2010-09-02 18:18:38
A:
[tp stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.style.zoom = '%f';", i]
%f stores i and says it is a float.
On a side note, if you want to specify how many decimals are displayed you would write %.02f
The zero tells it to pad the number with zeros. The '2' says show 2 decimal places. Another example: If you want three decimal places, use %.03f If you don't want the padding of zeros, remove the 0.
For 1.4, you would use %.1f
OOProg
2010-09-02 19:22:19