pagingEnabled=YESのUIScrollViewのスクロール先のページインデックスを取得
ヘッダーファイル
<UIScrollViewDelegate>
メインファイル
-(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
{
CGFloat width = scrollView.frame.size.width;
NSInteger page = (targetContentOffset->x + (0.5f * width)) / width;
int index=(int)page;
}
文字列に指定の文字列が含まれているか判定
BOOL has = [self hasSpecifiedString:@"abcdefg" searchString:@"cde"];
-(BOOL)hasSpecifiedString:(NSString*)targetString searchString:(NSString*)searchString
{
NSRange searchResult = [targetString rangeOfString:searchString];
return !(searchResult.location==NSNotFound);
}
performSelectorの警告を消す
#define SuppressPerformSelectorLeakWarning(Stuff) \
do { \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
Stuff; \
_Pragma("clang diagnostic pop") \
} while (0)
if (_delegate && _selector && [_delegate respondsToSelector:_selector]) {
SuppressPerformSelectorLeakWarning([_delegate performSelector:_selector withObject:[NSNumber numberWithBool:success]]);
}
フォルダを作る
-(BOOL)makeDir:(NSString*)dirPath
{
NSString* path=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
path=[path stringByAppendingPathComponent:dirPath];
NSError *error;
BOOL result = [[NSFileManager defaultManager] createDirectoryAtPath:path
withIntermediateDirectories:YES
attributes:nil
error:&error];
return result;
}
[self makeDir:@"test1/test2/jack"];
上記を実行すると下記の3つのフォルダが作られる。
test1
test1/test2
test1/test2/jack
ファイル、フォルダ削除
-(BOOL)removeFileByPath:(NSString*)filePath
{
NSString* path=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
path=[path stringByAppendingPathComponent:filePath];
NSFileManager *fm = [NSFileManager defaultManager];
NSError *error=nil;
BOOL flg=[fm fileExistsAtPath:path];
if (!flg) {
NSLog(@"no file");
return YES;
}
return [fm removeItemAtPath:path error:&error];
}
NSURLConnection::sendAsynchronousRequest
NSURL *url = [NSURL URLWithString:_url];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"GET"];
[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSLog(@"complete");
int statusCode = ((NSHTTPURLResponse *)response).statusCode;
NSLog(@"%d", statusCode );
}];
NSURLConnectionでファイルダウンロード
ヘッダーファイル
__strong NSMutableData *mData; long long filesize; float downloadedPercentage;
メインファイル
-(NSURLConnection*)exeHttpGetWithURL:(NSString*)_url queryString:(NSString*)_getQueryString delegate:(id)delegate
{
NSString *url=(_getQueryString)?[NSString stringWithFormat:@"%@?%@",_url,_getQueryString] : _url;
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
//送信
return [[NSURLConnection alloc] initWithRequest:request delegate:delegate];
}
/**
認証
**/
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
//basic認証のid,passを求められたら
if ([challenge previousFailureCount] == 0) {
NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"userID"
password:@"password"
persistence:NSURLCredentialPersistenceForSession];
[[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
}else {
//認証失敗
NSLog(@"failure");
[self hideDownloading];
}
}
/**
レスポンスあり
**/
- (void)connection: (NSURLConnection*) connection didReceiveResponse: (NSHTTPURLResponse*) response
{
int statusCode = (int)[response statusCode];
NSLog(@"statusCode:%d",statusCode);
//成功
if (statusCode == 200) {
filesize = [response expectedContentLength];
return;
}
//失敗
[self hideDownloading];
UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@"Error" message:@"問題が発生しました。\n・URLが間違っている\n・サーバに障害が発生している\n・ネットワークがつながっていない" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[alert show];
}
/**
データ受信
受信データが大きいときは一回で全データを取得できないので、mDataにappendDataしておく
**/
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
if (data) {
[mData appendData:data];
downloadedPercentage = ((float)[mData length] / (float)filesize);
[self updateDownloading:downloadedPercentage];
}
}
/**
データ受信完了
**/
- (void) connectionDidFinishLoading:(NSURLConnection *)connection{
[self saveData2FileAsync:mData filename:@"testfile.zip" delegate:self selector:@selector(onFileSaved:)];
}
-(void)onFileSaved:(NSNumber*)num
{
mData=nil;
BOOL success = [num intValue]==1;
NSLog(@"onFileSaved success:%d",success);
[self hideDownloading];
}
// ローカルにデータを保存
- (void)saveData2File:(NSData *)data filename:(NSString*)filename
{
NSString* dataPath=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
dataPath=[dataPath stringByAppendingPathComponent: filename ];
BOOL success = [data writeToFile:dataPath atomically:YES];
if (success) {
}else{
[self showSaveFailedAlert];
}
}
- (void)saveData2FileAsync:(NSData *)data filename:(NSString*)filename delegate:(id)_delegate selector:(SEL)_selector
{
NSString* dataPath=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
dataPath=[dataPath stringByAppendingPathComponent: filename ];
dispatch_queue_t main=dispatch_get_main_queue();
dispatch_queue_t sub=dispatch_queue_create("net.ktyr.sample", NULL);
dispatch_async(sub, ^{
BOOL success = [data writeToFile:dataPath atomically:YES];
dispatch_async(main, ^{
if (success) {
}else{
[self showSaveFailedAlert];
}
if (_delegate && _selector && [_delegate respondsToSelector:_selector]) {
[_delegate performSelector:_selector withObject:[NSNumber numberWithBool:success]];
}
});
});
}
-(void)showSaveFailedAlert
{
UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@"Failed to save file" message:@"ファイルの保存に失敗しました" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[alert show];
}
-(IBAction)onTapButton:(UIButton*)sender
{
mData=[[NSMutableData alloc]init];
filesize=0.0;
downloadedPercentage=0.0;
[self showDownloading];
//ダウンロード開始
[self exeHttpGetWithURL:url_tf.text queryString:nil delegate:self];
}
-(void)showDownloading
{
loadingView.hidden=NO;
loadingLable.text=@"0%";
loadingPV.progress=0.0;
}
-(void)updateDownloading:(float)percentage
{
loadingLable.text=[NSString stringWithFormat:@"%d%%",(int)(percentage*100.0)];
loadingPV.progress=percentage;
}
-(void)hideDownloading
{
loadingView.hidden=YES;
}
ターミナルからダミーファイルを作る
下記は1Mのファイルが出来る。
dd if=/dev/zero of=dummy.zip bs=1024 count=1000
Get,Postリクエスト
objective-c
ヘッダーファイル
__strong NSMutableData*mData;
メインファイル
-(NSString*)getQueryStringByDic:(NSDictionary*)dic
{
NSArray*keys = [dic allKeys];
NSMutableArray*tmp=[NSMutableArray array];
for (NSString*key in keys) {
[tmp addObject:[NSString stringWithFormat:@"%@=%@",key,dic[key]]];
}
return [tmp componentsJoinedByString:@"&"];
}
-(NSString*)getEncodedQueryStringByDic:(NSDictionary*)dic
{
NSArray*keys = [dic allKeys];
NSMutableArray*tmp=[NSMutableArray array];
for (NSString*key in keys) {
NSString*value = dic[key];
[tmp addObject:[NSString stringWithFormat:@"%@=%@",key,[value stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet alphanumericCharacterSet]] ]];
}
return [tmp componentsJoinedByString:@"&"];
}
-(NSString*)getDatetimeFromDate:(NSDate*)date
{
NSDateFormatter* form = [[NSDateFormatter alloc] init];
NSCalendar* cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
[form setCalendar: cal];
[form setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString* str = [form stringFromDate:date];
return str;
}
/**
返り値はNSArrayまたはNSDictionary
**/
-(id)getDataByJsonString:(NSString*)jsonString{
NSData *json_data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError*tmp=nil;
id data = [NSJSONSerialization JSONObjectWithData:json_data options:NSJSONReadingAllowFragments error:&tmp];
if (tmp) {
return nil;
}
return data;
}
-(NSURLConnection*)exeHttpGetWithURL:(NSString*)_url queryString:(NSString*)_getQueryString delegate:(id)delegate
{
NSString *url=[NSString stringWithFormat:@"%@?%@",_url,_getQueryString];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
//送信
return [[NSURLConnection alloc] initWithRequest:request delegate:delegate];
}
-(NSURLConnection*)exeHttpPostWithURL:(NSString*)_url queryString:(NSString*)_postQueryString delegate:(id)delegate
{
//リクエスト設定
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:_url]];
[request setHTTPMethod:@"POST"];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData];
[request setTimeoutInterval:20];
[request setHTTPShouldHandleCookies:FALSE];
NSData*httpBody=[_postQueryString dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:httpBody];
//送信
return [[NSURLConnection alloc] initWithRequest:request delegate:delegate];
}
/**
認証
**/
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
//basic認証のid,passを求められたら
if ([challenge previousFailureCount] == 0) {
NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"userID"
password:@"password"
persistence:NSURLCredentialPersistenceForSession];
[[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
}else {
//認証失敗
NSLog(@"failure");
}
}
/**
データ受信
受信データが大きいときは一回で全データを取得できないので、mDataにappendDataしておく
**/
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
if (data) {
[mData appendData:data];
}
}
/**
データ受信完了
**/
- (void) connectionDidFinishLoading:(NSURLConnection *)connection{
NSString*jsonString=[[NSString alloc] initWithData:mData encoding:NSUTF8StringEncoding];
mData=nil;
id json=[self getDataByJsonString:jsonString];
//NSDictionaryのとき
if ([json isKindOfClass:[NSDictionary class]]) {
NSLog(@"NSDictionary\n%@", [json description]);
//NSArrayのとき
}else if([json isKindOfClass:[NSArray class]]){
NSLog(@"NSDictionary\n%@", [json description]);
}
}
-(IBAction)onTapButton:(UIButton*)sender
{
mData=[[NSMutableData alloc]init];
NSString*url=@"/php/50/index.php";
NSMutableDictionary*dic=[NSMutableDictionary dictionary];
dic[@"datetimeOfSend"]=[self getDatetimeFromDate:[NSDate date]];
dic[@"message"]=@"あいうえお";
switch ((int)sender.tag) {
case 0://GET
[self exeHttpGetWithURL:url queryString:[self getEncodedQueryStringByDic:dic] delegate:self];
break;
case 1://POST
[self exeHttpPostWithURL:url queryString:[self getQueryStringByDic:dic] delegate:self];
break;
default:
break;
}
}
php
$tmp=array("yourData" => "none" );
if(!empty($_GET)){
$tmp["yourData"]=$_GET;
$tmp["method"]="GET";
}else if(!empty($_POST)){
$tmp["yourData"]=$_POST;
$tmp["method"]="POST";
}
$tmp["datetime"]=date("Y-m-d H:i:s");
$tmp["randomStr"]=getRandomStr(48);
$tmp["name"]="john";
$tmp["place"]="newyork";
$tmp["device"]="iPhone5s";
header("Content-Type: application/json; charset=utf-8");
echo json_encode($tmp);
exit;
function getRandomStr($length=8){
$str='';
for ($i = 0, $str = null; $i < $length; ) {
$num = mt_rand(0x30, 0x7A);
if ((0x30 <= $num && $num <= 0x39) || (0x41 <= $num && $num <= 0x5A) || (0x61 <= $num && $num <= 0x7A)) {
$str .= chr($num);
$i++;
}
}
return $str;
}
NSLogの結果 GET
NSDictionary
{
datetime = "2014-04-11 14:37:28";
device = iPhone5s;
method = GET;
name = john;
place = newyork;
randomStr = aepa0FUQzn2hOJbB7mwzDztUzpE0FuV5kyihl8t90LQSfNoa;
yourData = {
datetimeOfSend = "2014-04-11 14:37:28";
message = "\U3042\U3044\U3046\U3048\U304a";
};
}
NSLogの結果 Post
NSDictionary
{
datetime = "2014-04-11 14:40:43";
device = iPhone5s;
method = POST;
name = john;
place = newyork;
randomStr = if7wIKtiAIxgJ32GzIlXOPOvzmokZYR6emlJhIpDvmlO8F2S;
yourData = {
datetimeOfSend = "2014-04-11 14:40:43";
message = "\U3042\U3044\U3046\U3048\U304a";
};
}
NSDictionaryをクエリ文字列にする
-(NSString*)getQueryStringByDic:(NSDictionary*)dic
{
NSArray*keys = [dic allKeys];
NSMutableArray*tmp=[NSMutableArray array];
for (NSString*key in keys) {
[tmp addObject:[NSString stringWithFormat:@"%@=%@",key,dic[key]]];
}
return [tmp componentsJoinedByString:@"&"];
}
-(NSString*)getEncodedQueryStringByDic:(NSDictionary*)dic
{
NSArray*keys = [dic allKeys];
NSMutableArray*tmp=[NSMutableArray array];
for (NSString*key in keys) {
NSString*value = dic[key];
[tmp addObject:[NSString stringWithFormat:@"%@=%@",key,[value stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet alphanumericCharacterSet]] ]];
}
return [tmp componentsJoinedByString:@"&"];
}
-(IBAction)onTapButton:(id)sender
{
NSMutableDictionary*dic=[NSMutableDictionary dictionary];
dic[@"id"]=@"285";
dic[@"name"]=@"jeff";
dic[@"place"]=@"newyork";
dic[@"version"]=@"iOS7.1";
NSLog(@"%@", [self getQueryStringByDic:dic] );
}
結果
place=newyork&id=285&name=jeff&version=iOS7.1