加载webView发送请求

最新推荐文章于 2025-03-30 10:33:51 发布

转载最新推荐文章于 2025-03-30 10:33:51 发布 · 454 阅读

本文介绍了一个iOS应用中使用UIWebView发起POST请求的方法。通过创建可变的URLRequest并设置HTTP方法为POST，同时添加了必要的头部信息如Content-Type等，并将参数字典转化为POST数据。此外还详细介绍了如何对POST数据进行编码处理。

[self loadWebView:_webView withURLString:@"http://sjkdslfskdlnkndsnk" andPostDictionaryOrNil:_para];

- (void) loadWebView:(UIWebView *)theWebView withURLString:(NSString *)urlString andPostDictionaryOrNil:(NSDictionary *)postDictionary

{

NSURL *url = [NSURL URLWithString:urlString];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url

cachePolicy:NSURLRequestReloadIgnoringCacheData

timeoutInterval:60.0];

// DATA TO POST

if(postDictionary) {

NSString *postString = [self getFormDataString:postDictionary];

NSData *postData = [postString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];

[request setHTTPMethod:@"POST"];

// [request setValue:@"text/html;charset=utf-8" forHTTPHeaderField:@"Content-Type"];

[request addValue:@"IOS" forHTTPHeaderField:@"YUFU-TERMINAL-TYPE"];

[request addValue:@"1.0.1" forHTTPHeaderField:@"YUFU-TERMINAL-VERSION"];

[request setValue:@"application/x-www-form-urlencoded; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

[request setHTTPBody:postData];

}

[theWebView loadRequest:request];

}

- (NSString *)getFormDataString:(NSDictionary*)dictionary {

if( ! dictionary) {

return nil;

}

NSArray* keys = [dictionary allKeys];

NSMutableString* resultString = [[NSMutableString alloc] init];

for (int i = 0; i < [keys count]; i++) {

NSString *key = [NSString stringWithFormat:@"%@", [keys objectAtIndex: i]];

NSString *value = [NSString stringWithFormat:@"%@", [dictionary valueForKey: [keys objectAtIndex: i]]];

NSString *encodedKey = [self escapeString:key];

NSString *encodedValue = [self escapeString:value];

NSString *kvPair = [NSString stringWithFormat:@"%@=%@", encodedKey, encodedValue];

if(i > 0) {

[resultString appendString:@"&"];

}

[resultString appendString:kvPair];

}

return resultString;

}

//对key和Value的数据进行编码处理

- (NSString *)escapeString:(NSString *)string {

if(string == nil || [string isEqualToString:@""]) {

return @"";

}

NSString *outString = [NSString stringWithString:string];

outString = [outString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

// BUG IN stringByAddingPercentEscapesUsingEncoding

// WE NEED TO DO several OURSELVES

outString = [self replace:outString lookFor:@"&" replaceWith:@"%26"];

outString = [self replace:outString lookFor:@"?" replaceWith:@"%3F"];

outString = [self replace:outString lookFor:@"=" replaceWith:@"%3D"];

outString = [self replace:outString lookFor:@"+" replaceWith:@"%2B"];

outString = [self replace:outString lookFor:@";" replaceWith:@"%3B"];

return outString;

}

//去掉空格和特殊字符

- (NSString *)replace:(NSString *)originalString lookFor:(NSString *)find replaceWith:(NSString *)replaceWith {

if ( ! originalString || ! find) {

return originalString;

}

if( ! replaceWith) {

replaceWith = @"";

}

NSMutableString *mstring = [NSMutableString stringWithString:originalString];

NSRange wholeShebang = NSMakeRange(0, [originalString length]);

[mstring replaceOccurrencesOfString: find

withString: replaceWith

options: 0

range: wholeShebang];

return [NSString stringWithString: mstring];

}