KentarouKanno

// UIViewをUIImageに変換する(objective-c)
- (UIImage*)convertUIimageFromUIview:(UIView*)view {
    
    UIGraphicsBeginImageContext(view.frame.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}

KentarouKanno

var a: AnyObject? = 1
var c = (a as! NSNumber)

var array = ["a","b","c"]

var b = array[c.integerValue]
//=> b = "b"

var d = array[(a as! NSNumber).integerValue + 1]
//=> d = "c"

KentarouKanno

#import "ViewController.h"
#import <CoreBluetooth/CoreBluetooth.h>

@interface ViewController ()<CBCentralManagerDelegate>
@end

@interface ViewController () {
@property (nonatomic) CBCentralManager *bluetoothManager;
@end

KentarouKanno

let limitByte: Int = 1000000
var compressionQuality: CGFloat = 1.0
var data: NSData!
            
repeat {
    data = UIImageJPEGRepresentation(images,compressionQuality)
    print("Quality\((compressionQuality)) = \(data!.length)")
    compressionQuality -= 0.1
} while data?.length > limitByte

KentarouKanno

BOOL isFrontViewShowing;


- (void) viewDidLoad{
    [super viewDidLoad];

    isFrontViewShowing = YES;

    UIButton *flipBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    flipBtn.frame = CGRectMake(100, 100, 100, 40);

KentarouKanno

// ViewController

var focusCellIndex: NSIndexPath!

func keyboardDidShow(notification: NSNotification) {
    
    let rect = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
    UIView.animateWithDuration(0, animations: {
        self.mainTableView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.viewHeight - rect.height)
        }) { (boolValue) -> Void in

KentarouKanno

// ~=	パターンマッチ(左辺の範囲内に右辺が有ればtrue)

200 //=> Contains
300 //=> Not Contains

let status = 299
//=> Contains

if (200 ..< 300) ~= status {

KentarouKanno

let dict = ["key1":"value1","key2":"value2","key3":"value3"]

// 変数を宣言（初期値を設定）
var value1: String = "defaultValue"

// 値が取得できれば代入
if let tmpValue = dict["key"] {
    value1 = tmpValue
}

KentarouKanno

// 使用例

let errorMessage = MessageManager.LoginView.IDMaxLengthError
//=> IDは10桁で入力してください。


struct MessageManager {

    /** 入力画面 */
    struct InputView {

KentarouKanno

// 配列を区切り文字で連結

(Obj-C)
NSArray *array = @[@"1",@"2",@"3",@"4",@"5"];
NSString *joinedString = [array componentsJoinedByString:@","];

(Swift)
let joinedString = ["1", "2", "3", "4", "5"].joinWithSeparator(",")
//=> "1,2,3,4,5"