iPhone-使用UIWebView评估JavaScript和正则表达式 [英] iPhone - evaluating JavaScript and Regular Expressions using UIWebView
问题描述
在我的iPhone项目中，我需要能够通过使用Javascript函数或使用正则表达式来验证字符串.
In my iPhone project, I needed to be able to validate a string either by using a Javascript function or by using a regular expression.
此代码已使用jQuery代码中的JavaScript和正则表达式进行了测试: http://docs.jquery.com/Plugins/Validation/Methods/email http://docs.jquery.com/Plugins/Validation/Methods/url http://docs.jquery.com/Plugins/Validation/Methods/date http://docs.jquery.com/Plugins/Validation/Methods/dateISO http://docs.jquery.com/Plugins/Validation/Methods/number http://docs.jquery.com/Plugins/Validation/Methods/digits http://docs.jquery.com/Plugins/Validation/Methods/creditcard
This code was tested using the JavaScript and Regular Expressions from the jQuery code: http://docs.jquery.com/Plugins/Validation/Methods/email http://docs.jquery.com/Plugins/Validation/Methods/url http://docs.jquery.com/Plugins/Validation/Methods/date http://docs.jquery.com/Plugins/Validation/Methods/dateISO http://docs.jquery.com/Plugins/Validation/Methods/number http://docs.jquery.com/Plugins/Validation/Methods/digits http://docs.jquery.com/Plugins/Validation/Methods/creditcard
我搜索了一个完整的解决方案，并且可能错过了它，所以我决定整理并实施NSString + JavaScript + RegEx ...
I searched for a complete solution and probably missed it, so I decided to pick the pieces up and implement NSString+JavaScript+RegEx...
我将其作为答案发布在下面，以防它对任何人都有价值...
I've posted it as an answer below, in case it's of value to anyone...
鲁汶
推荐答案
以下是代码清单，希望对您有用:
Here are the code listings, hope you find is useful:
////NSString + JavaScript + RegEx.h//
@interface NSString(JavaScript_RegEx)
// Built-in rules
+ (NSArray*) emailRule;
+ (NSArray*) urlRule;
+ (NSArray*) dateRule;
+ (NSArray*) dateISORule;
+ (NSArray*) numberRule;
+ (NSArray*) digitsRule;
+ (NSArray*) creditcardRule;
- (NSString*) javascriptValue;
- (NSString*) regexTestValue:(NSString*)value;
@end
////NSString + JavaScript + RegEx.m//
#import "NSString+JavaScript+RegEx.h"
@implementation NSString(JavaScript_RegEx)
static NSString* kUIWebViewWrapperForJS = @"(function () {\ntry {\n%@\n}\ncatch (err)\n{\nreturn err;\n}\n}) ();";
static NSString* kJSWrapperForRegEx = @"re = new RegExp(/%@/); return re.test('%@')";
+ (NSArray*) emailRule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:0], // 0=RegEx
@"^((([a-z]|\\d|[!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])+(\\.([a-z]|\\d|[!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])+)*)|((\\x22)((((\\x20|\\x09)*(\\x0d\\x0a))?(\\x20|\\x09)+)?(([\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x7f]|\\x21|[\\x23-\\x5b]|[\\x5d-\\x7e]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(\\\\([\\x01-\\x09\\x0b\\x0c\\x0d-\\x7f]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]))))*(((\\x20|\\x09)*(\\x0d\\x0a))?(\\x20|\\x09)+)?(\\x22)))@((([a-z]|\\d|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(([a-z]|\\d|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])*([a-z]|\\d|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])))\\.)+(([a-z]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(([a-z]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])*([a-z]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])))\\.?$",
@"Please enter a valid email address.",
nil];
}
+ (NSArray*) urlRule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:0], // 0=RegEx
@"^(https?|ftp):\\/\\/(((([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(%[\\da-f]{2})|[!\\$&'\\(\\)\\*\\+,;=]|:)*@)?(((\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5]))|((([a-z]|\\d|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(([a-z]|\\d|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])*([a-z]|\\d|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])))\\.)+(([a-z]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(([a-z]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])*([a-z]|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])))\\.?)(:\\d*)?)(\\/((([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(%[\\da-f]{2})|[!\\$&'\\(\\)\\*\\+,;=]|:|@)+(\\/(([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(%[\\da-f]{2})|[!\\$&'\\(\\)\\*\\+,;=]|:|@)*)*)?)?(\\?((([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(%[\\da-f]{2})|[!\\$&'\\(\\)\\*\\+,;=]|:|@)|[\\uE000-\\uF8FF]|\\/|\\?)*)?(\\#((([a-z]|\\d|-|\\.|_|~|[\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF])|(%[\\da-f]{2})|[!\\$&'\\(\\)\\*\\+,;=]|:|@)|\\/|\\?)*)?$",
@"Please enter a valid URL.",
nil];
}
+ (NSArray*) dateRule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:1], // 1=JS
@"return !/Invalid|NaN/.test(new Date(\"%@\"));", // expect a date
@"Please enter a valid date.",
nil];
}
+ (NSArray*) dateISORule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:0], // 0=RegEx
@"^\\d{4}[\\/-]\\d{1,2}[\\/-]\\d{1,2}$",
@"Please enter a valid date.",
nil];
}
+ (NSArray*) numberRule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:0], // 0=RegEx
@"^-?(?:\\d+|\\d{1,3}(?:,\\d{3})+)(?:\\.\\d+)?$",
@"Please enter a valid number.",
nil];
}
+ (NSArray*) digitsRule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:0], // 0=RegEx
@"^\\d+$",
@"Please enter only digits.",
nil];
}
+ (NSArray*) creditcardRule {
return [NSArray arrayWithObjects:[NSNumber numberWithInt:1], // 1=JS
@"// accept only digits and dashes\n"
"var value = \"%@\";\n"
"if (/[^0-9-]+/.test(value))\n"
" return false;\n"
"var nCheck = 0, nDigit = 0, bEven = false;\n"
"value = value.replace(/\\D/g, \"\");\n"
"for (var n = value.length - 1; n >= 0; n--) {\n"
" var cDigit = value.charAt(n);\n"
" var nDigit = parseInt(cDigit, 10);\n"
" if (bEven) {\n"
" if ((nDigit *= 2) > 9)\n"
" nDigit -= 9;\n"
" }\n"
" nCheck += nDigit;\n"
" bEven = !bEven;\n"
"}\n"
"return (nCheck %% 10) == 0;",
@"Please enter a valid credit card number.",
nil];
}
- (NSString*) javascriptValue {
NSString* jsForWebView = [NSString stringWithFormat:kUIWebViewWrapperForJS, self]; // convert to "JS-edible-by-UIWebView"
UIWebView *wb = [[[UIWebView alloc] init] autorelease];
//NSLog(@"%s\n%@\n", __FUNCTION__, jsForWebView);
NSString* result = [wb stringByEvaluatingJavaScriptFromString:jsForWebView];
return result;
}
- (NSString*) regexTestValue:(NSString*)value {
NSString* javascriptWrappedRegEx = [NSString stringWithFormat:kJSWrapperForRegEx, self, value];
NSString* result = [javascriptWrappedRegEx javascriptValue];
return result;
}
@end
享受，鲁汶
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