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我在这个网站上读到如何嵌入和UILabel（子类UILabel并覆盖所需的方法）。在将其添加到我的应用程序之前，我决定在独立的测试应用程序中对其进行测试。代码如下所示。SubClassing UILabel
这里的MyUILabel.h
#import <UIKit/UIKit.h>
@interface MyUILabel : UILabel
@end
这里的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)];
}
这里是我的ViewController.h
#import <UIKit/UIKit.h>
#import "MyUILabel.h"
@interface ViewController : UIViewController
{
MyUILabel *myDisplay;
}
@property (strong, nonatomic) IBOutlet MyUILabel *myDisplay;
@end
这里的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方法无（即林压倒一切）被调用。
深入分析为什么非常感谢。
Regards，
拉蒙。