6
我在這個網站上讀到如何嵌入和UILabel（子類UILabel並覆蓋所需的方法）。在將其添加到我的應用程序之前，我決定在獨立的測試應用程序中對其進行測試。代碼如下所示。SubClassing UILabel
這裏的MyUILabel.h
#import <UIKit/UIKit.h>
@interface MyUILabel : UILabel
@end
這裏的MyUILabel.m
#import "MyUILabel.h"
#import <QuartzCore/QuartzCore.h>
@implementation MyUILabel
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
// for border and rounding
-(void) drawRect:(CGRect)rect
{
self.layer.cornerRadius = 4.0;
self.layer.borderWidth = 2;
[super drawRect:rect];
}
// for inset
-(void) drawTextInRect:(CGRect)rect
{
UIEdgeInsets insets = {0, 5, 0, 5};
[super drawTextInRect: UIEdgeInsetsInsetRect(rect, insets)];
}
這裏是我的ViewController.h
#import <UIKit/UIKit.h>
#import "MyUILabel.h"
@interface ViewController : UIViewController
{
MyUILabel *myDisplay;
}
@property (strong, nonatomic) IBOutlet MyUILabel *myDisplay;
@end
這裏的ViewController.m：
#import "ViewController.h"
@interface ViewController()
@end
@implementation ViewController
@synthesize myDisplay;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myDisplay.text = @"Hello World!";
}
- (void)viewDidUnload
{
[self setMyDisplay:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
@end
的MyUILabel.m方法無（即林壓倒一切）被調用。
深入分析爲什麼非常感謝。
Regards，
拉蒙。