iOS知识小集 第三期

1

var tintColor: UIColor!

1

var tintAdjustmentMode: UIViewTintAdjustmentMode

12
3
4
5

enum UIViewTintAdjustmentMode : Int {
case Automatic          // 视图的着色调整模式与父视图一致
case Normal             // 视图的tintColor属性返回完全未修改的视图着色颜色
case Dimmed             // 视图的tintColor属性返回一个去饱和度的、变暗的视图着色颜色
}

1

func tintColorDidChange()

12
3
4
5
6
7
8
9
10
1112
13
14
15
16
17

override func viewDidLoad() {
super.viewDidLoad()

println("\(self.view.tintAdjustmentMode.rawValue)")         // 输出：1println("\(self.view.tintColor)")                           // 输出：UIDeviceRGBColorSpace 0 0.478431 1 1self.view.tintAdjustmentMode = .Normal
self.dimTintSwitch?.on = false

// 加载图片
var shinobiHead = UIImage(named: "shinobihead")
// 设置渲染模式
shinobiHead = shinobiHead?.imageWithRenderingMode(.AlwaysTemplate)
self.tintedImageView?.image = shinobiHead
self.tintedImageView?.contentMode = .ScaleAspectFit
}

12
3
4
5
6
7
8
9
10
1112
13

@IBAction func changeColorHandler(sender: AnyObject) {
let hue = CGFloat(arc4random() % 256) / 256.0
let saturation = CGFloat(arc4random() % 128) / 256.0 + 0.5
let brightness = CGFloat(arc4random() % 128) / 256.0 + 0.5

let color = UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: 1.0)
self.view.tintColor = color
updateViewConstraints()
}

private func updateProgressViewTint() {
self.progressView?.progressTintColor = self.view.tintColor
}

12
3
4
5
6
7
8

@IBAction func dimTimtHandler(sender: AnyObject) {
if let isOn = self.dimTintSwitch?.on {

self.view.tintAdjustmentMode = isOn ? .Dimmed : .Normal
}

updateViewConstraints()
}

12
3
4

override func tintColorDidChange() {
tintColorLabel.textColor = self.tintColor
tintColorBlock.backgroundColor = self.tintColor
}

12
3

var shinobiHead = UIImage(named: "shinobihead")
// 设置渲染模式
shinobiHead = shinobiHead?.imageWithRenderingMode(.AlwaysTemplate)

12
3
4
5

#if TARGET_OS_IPHONE
#define MAS_VIEW UIView
#elif TARGET_OS_MAC
#define MAS_VIEW NSView
#endif

12
3
4
5

#if os(iOS)
typealias MAS_VIEW = UIView
#elseif os(OSX)
typealias MAS_VIEW = NSView
#endif

12
3
4
5

#if DEBUG
let totalSeconds = totalMinutes
#else
let totalSeconds = totalMinutes * 60
#endif

12
3
4
5

#if build configuration
statements
#else
statements
#endif

12
3
4
5
6
7

#if build configuration && !build configuration
statements
#elseif build configuration
statements
#else
statements
#endif

12
3
4
5
6

UIKeyboardWillShowNotification         // 键盘显示之前
UIKeyboardDidShowNotification          // 键盘显示完成后
UIKeyboardWillHideNotification         // 键盘隐藏之前
UIKeyboardDidHideNotification          // 键盘消息之后
UIKeyboardWillChangeFrameNotification  // 键盘大小改变之前
UIKeyboardDidChangeFrameNotification   // 键盘大小改变之后

12
3
4
5
6
7
8
9
10
11

// 键盘在动画开始前的frame
let UIKeyboardFrameBeginUserInfoKey: String

// 键盘在动画线束后的frame
let UIKeyboardFrameEndUserInfoKey: String

// 键盘的动画曲线
let UIKeyboardAnimationCurveUserInfoKey: String

// 键盘的动画时间
let UIKeyboardAnimationDurationUserInfoKey: String

12
3
4

keyboard will change
keyboard will show
keyboard did change
keyboard did show

12
3
4

keyboard will change
keyboard will show
keyboard did change
keyboard did show

12
3
4

keyboard will change
keyboard will hide
keyboard did change
keyboard did hide

12
3
4
5
6
7
8
9
10

if let dict = notification.userInfo {
var animationDuration: NSTimeInterval = 0
var animationCurve: UIViewAnimationCurve = .EaseInOut
var keyboardEndFrame: CGRect = CGRectZero

dict[UIKeyboardAnimationCurveUserInfoKey]?.getValue(&animationCurve)
dict[UIKeyboardAnimationDurationUserInfoKey]?.getValue(&animationDuration)
dict[UIKeyboardFrameEndUserInfoKey]?.getValue(&keyboardEndFrame)
......
}

12
3
4

- (UIView *)pickerView:(UIPickerView *)pickerView
viewForRow:(NSInteger)row
forComponent:(NSInteger)component
reusingView:(UIView *)view

12
3
4
5
6
7
8
9
10
1112

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
PickerViewCell *pickerCell = (PickerViewCell *)view;

if (!pickerCell) {
NSInteger column = 3;
pickerCell = [[PickerViewCell alloc] initWithFrame:(CGRect){CGPointZero, [UIScreen mainScreen].bounds.size.width, 45.0f} column:column];
}

[pickerCell setLabelTexts:@[...]];

return pickerCell;
}

12
3

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}

1

var myViewControllers: [AnyObject]? = navigationController?.viewControllers

12
3

for controller in myViewControllers {
...
}

1

[AnyObject]? does not have a member named "Generator"

12
3
4
5

if let controllers = myViewControllers {
for controller in controllers {
......
}
}