objective-c - stringByAddingPercentEscapesUsingEncoding 弃用

Question

这已弃用“stringByAddingPercentEscapesUsingEncoding”，我想用更新一替换这一行。

NSString *encodedString = [modalData.imageURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

Answer 1

尝试下面的代码行:

NSString *encodedString = [modalData.imageURL stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLHostAllowedCharacterSet]];

stringByAddingPercentEncodingWithAllowedCharacters:

Returns a new string made from the receiver by replacing all characters not in the specified set with percent encoded characters.

字符集被传递给 - stringByAddingPercentEncodingWithAllowedCharacters:

+ (NSCharacterSet *)URLUserAllowedCharacterSet;
+ (NSCharacterSet *)URLPasswordAllowedCharacterSet;
+ (NSCharacterSet *)URLHostAllowedCharacterSet;
+ (NSCharacterSet *)URLPathAllowedCharacterSet;
+ (NSCharacterSet *)URLQueryAllowedCharacterSet;
+ (NSCharacterSet *)URLFragmentAllowedCharacterSet;

引用:https://developer.apple.com/reference/foundation/nsstring/1411946-stringbyaddingpercentencodingwit