iOS常用知識ポイントまとめ

0.setメソッドが割り当てられない

1.親コントロールの子viewを削除する

[self.view.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; 

2.Xcode log不完全

#ifdef DEBUG
#define CSLog(format, ...) printf("class:  method: %s 
%s
", self, [[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, __PRETTY_FUNCTION__, [[NSString stringWithFormat:(format), ##__VA_ARGS__] UTF8String] )
#else
#define CSLog(format, ...)
#endif 

3.UIIMage画像の引き伸ばし方法

- (UIImage *)resizableImage:(NSString *)name
{
    UIImage *image = [UIImage imageNamed:name];
    return [image stretchableImageWithLeftCapWidth:image.size.width * 0.5 topCapHeight:image.size.height * 0.5];
}

4.文字列切り取り情報

NSUInteger loc = [string rangeOfString:@"\":\""].location + 3;
NSUInteger len = [string rangeOfString:@"\"}"].location - loc;
NSString *msg = [string substringWithRange:NSMakeRange(loc, len)];

5.URLの中国語変換

NSString *encodedString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//  
NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:name1];
NSString *abc = [name1 stringByAddingPercentEncodingWithAllowedCharacters:set];

[str stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//   
str.stringByRemovingPercentEncoding
//////////
NSString *urlStr = [NSString stringWithFormat:@"http://localhost/login?username= &pwd=123"];  
urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];  

6.配列順と追加時に来る

NSArray* reversedArray = [[self.keyRecordData reverseObjectEnumerator] allObjects];

7.キーボードを終了

 [self.view endEditing:YES];

 [self.messageField resignFirstResponder];

 [self.messageField endEditing:YES];

8.電話をかける

 NSMutableString *str=[[NSMutableString alloc] initWithFormat:@"telprompt://%@",twoModel.UserPhone];
 UIWebView *callWebview = [[UIWebView alloc] init];
 [callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]]];
 [self.view addSubview:callWebview];

9.バージョン番号の取得

NSString *appVersion =[[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];

10. __weak

__weak UITextField * weakTf = textField;

11文字の高さを取得

CGFloat h = [model.message boundingRectWithSize:CGSizeMake([UIScreen mainScreen].bounds.size.width - kGAP-kAvatar_Size - 2*kGAP, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size.height+0.5;

12 section

 _dataArray = @[@{ @"key":@" ",
                          @"value":@[@" ",@" ",@" ",@" (cm)",@" (kg)"],
                          },
                       @{ @"key":@" ",
                          @"value":@[@" / ",@" "],
                          },
                       @{ @"key":@" ",
                          @"value":@[@" ",@" ",@" "],
                          },
                       @{ @"key":@" ",
                          @"value":@[@" ",@" "],
                          }
                       ];

13 xibを使用してlabelにショートカットを折り返す

14スペースのフィルタ

 // 
    NSString *textString = [textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

15 absoluteString

NSURL *url = [NSURL URLWithString:@"http://www.baidu.com/search?id=1"];
2
    NSLog(@"scheme:%@", [url scheme]); //  http
3
    NSLog(@"host:%@", [url host]);     //  www.baidu.com
4
    NSLog(@"absoluteString:%@", [url absoluteString]); // url  http://www.baidu.com:8080/search?id=1   ( ，  8080  )
5
    NSLog(@"relativePath: %@", [url relativePath]); //  search
6
    NSLog(@"port :%@", [url port]);  //   8080
7
    NSLog(@"path: %@", [url path]);  //   search
8
    NSLog(@"pathComponents:%@", [url pathComponents]); // search
9
    NSLog(@"Query:%@", [url query]);  //  id=1

16 UIcollectionView flowlayout固定itemの設定

 
    CGFloat margin = (kScreenWidth - ZKCommonCollectionHW *3)/4.0;
    //  （ ）  
    flowLayout.minimumLineSpacing = margin;
    // cell cell （ ）  
    flowLayout.minimumInteritemSpacing = margin;
    flowLayout.itemSize = CGSizeMake(ZKCommonCollectionHW,ZKCommonCollectionHW);
   //  collectionView     
    flowLayout.sectionInset = UIEdgeInsetsMake(margin, margin, margin*3 , margin);

//  sdlayout  frame    insert  3 。
 
 _collectionView.sd_layout.spaceToSuperView(UIEdgeInsetsZero);
 
   flowLayout.sectionInset = UIEdgeInsetsMake(margin, margin, margin , margin);

17 APPの初回と更新後の起動

// NO  
- (BOOL)hasLaunched {
    
    NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    if (![[userDefaults objectForKey:@"version"] isEqualToString:version]) {
        [userDefaults setObject:version forKey:@"version"];
        return NO;
    }else {
        return YES;
    }
}