Anda dapat membuat kelas dengan UIToolBar yang merupakan subkelas dari UIView dan membuat instance di pengontrol tampilan terpisah. Pendekatan ini mendemonstrasikan UIToolBar tembus pandang (disubkelas oleh UIView) yang memberikan umpan balik langsung (dalam hal ini untuk AVCaptureSession).
YourUIView.h
#import <UIKit/UIKit.h>
@interface YourUIView : UIView
@property (nonatomic, strong) UIColor *blurTintColor;
@property (nonatomic, strong) UIToolbar *toolbar;
@end
YourUIView.m
#import "YourUIView.h"
@implementation YourUIView
- (instancetype)init
{
self = [super init];
if (self) {
[self setup];
}
return self;
}
- (void)setup {
// If we don't clip to bounds the toolbar draws a thin shadow on top
[self setClipsToBounds:YES];
if (![self toolbar]) {
[self setToolbar:[[UIToolbar alloc] initWithFrame:[self bounds]]];
[self.toolbar setTranslatesAutoresizingMaskIntoConstraints:NO];
[self insertSubview:[self toolbar] atIndex:0];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_toolbar]|"
options:0
metrics:0
views:NSDictionaryOfVariableBindings(_toolbar)]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_toolbar]|"
options:0
metrics:0
views:NSDictionaryOfVariableBindings(_toolbar)]];
}
}
- (void) setBlurTintColor:(UIColor *)blurTintColor {
[self.toolbar setBarTintColor:blurTintColor];
}
@end
Setelah UIView di atas telah disesuaikan, lanjutkan dan buat kelas yang merupakan subkelas dari ViewController. Di bawah ini saya telah membuat kelas yang menggunakan sesi AVCapture. Anda harus menggunakan AVCaptureSession untuk mengganti konfigurasi kamera bawaan Apple. Dengan demikian Anda dapat melapisi UIToolBar tranclucent dari kelas YourUIView .
YourViewController.h
#import <UIKit/UIKit.h>
@interface YourViewController : UIViewController
@property (strong, nonatomic) UIView *frameForCapture;
@end
YourViewController.m
#import "YourViewController.h"
#import <AVFoundation/AVFoundation.h>
#import "TestView.h"
@interface YourViewController ()
@property (strong, nonatomic) UIButton *displayToolBar;
@end
@implementation YourViewController
AVCaptureStillImageOutput *stillImageOutput;
AVCaptureSession *session;
- (void) viewWillAppear:(BOOL)animated
{
session = [[AVCaptureSession alloc] init];
[session setSessionPreset:AVCaptureSessionPresetPhoto];
AVCaptureDevice *inputDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error;
AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:&error];
if ([session canAddInput:deviceInput]) {
[session addInput:deviceInput];
}
AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
[previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
CALayer *rootLayer = [[self view] layer];
[rootLayer setMasksToBounds:YES];
CGRect frame = [[UIScreen mainScreen] bounds];
self.frameForCapture.frame = frame;
[previewLayer setFrame:frame];
[rootLayer insertSublayer:previewLayer atIndex:0];
stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG, AVVideoCodecKey, nil];
[stillImageOutput setOutputSettings:outputSettings];
[session addOutput:stillImageOutput];
[session startRunning];
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
- (void)viewDidLoad
{
[super viewDidLoad];
/* Open button */
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 350, self.view.bounds.size.width, 50)];
[button addTarget:self action:@selector(showYourUIView:) forControlEvents:UIControlEventTouchUpInside];
[button setTitle:@"Open" forState:UIControlStateNormal];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
button.backgroundColor = [UIColor greenColor];
[self.view addSubview:button];
UIButton *anotherButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 50, self.view.bounds.size.width, 50)];
[anotherButton addTarget:self action:@selector(showYourUIView:) forControlEvents:UIControlEventTouchUpInside];
[anotherButton setTitle:@"Open" forState:UIControlStateNormal];
[anotherButton setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
anotherButton.backgroundColor = [UIColor redColor];
[self.view addSubview:anotherButton];
}
- (void) showYourUIView:(id) sender
{
TestView *blurView = [TestView new];
[blurView setFrame:self.view.bounds];
[self.view addSubview:blurView];
}
@end
