URL format to string format and string interception

There are 2 main ways to intercept a string: (URL format characters cannot be intercepted must be a special string to intercept)

Take out the URL of the picture

Nsurl *url=[info Objectforkey:uiimagepickercontrollerreferenceurl];

NSLog (@ "qqqq:%@", url);

Qqqq:assets-library://asset/asset. Jpg?id=3d3341a0-403d-488c-8c57-69573c779abd&ext=jpg

//Convert URL to string format to intercept

NSString *string = [[url absolutestring] stringbyreplacingpercentescapesusingencoding:nsutf8stringencoding];

1. Intercept from the beginning of a subscript to the end and from the beginning to a certain underlying self-string

Truncate a substring from one subscript to the end

NSString *STR1 = [string substringfromindex:36];

NSLog (@ "x≈%@", string);

X≈assets-library://asset/asset. Jpg?id=3d3341a0-403d-488c-8c57-69573c779abd&ext=jpg

2. Intercept a substring between two characters

Nsarray *array=[string componentsseparatedbystring:@ "="];

NSString *str1=array[1];

NSLog (@ "truncated string:%@", str1);

post-intercept string: 3d3341a0-403d-488c-8c57-69573c779abd&ext

Save pictures to local (write your own method)

[Self saveimage:image withname:str1];

URL format to string format and string interception