自定义UILabel不显示文本
问题描述:
我做了一个自定义的UILabel类,其中我在框架的底部绘制一条红线。 红线显示,但我不能让文字显示。自定义UILabel不显示文本
#import <UIKit/UIKit.h>
@interface LetterLabel : UILabel {
}
@end
#import "LetterLabel.h"
@implementation LetterLabel
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
// Initialization code
}
return self;
}
- (void)drawRect:(CGRect)rect {
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 2.0);
CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 1.0, 0.0, 0.0, 1.0);
CGContextBeginPath(UIGraphicsGetCurrentContext());
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), 0.0, self.frame.size.height);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), self.frame.size.width, self.frame.size.height);
CGContextStrokePath(UIGraphicsGetCurrentContext());
}
- (void)dealloc {
[super dealloc];
}
@end
#import <UIKit/UIKit.h>
#import "Word.h"
@interface WordView : UIView {
Word *gameWord;
}
@property (nonatomic, retain) Word *gameWord;
@end
@implementation WordView
@synthesize gameWord;
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
self.backgroundColor = [UIColor whiteColor];
LetterLabel *label = [[LetterLabel alloc] initWithFrame:CGRectMake(0, 0, 20, 30)];
label.backgroundColor = [UIColor cyanColor];
label.textAlignment = UITextAlignmentCenter;
label.textColor = [UIColor blackColor];
[label setText:@"t"];
[self addSubview:label];
}
return self;
}
- (void)drawRect:(CGRect)rect {
// Drawing code
}
- (void)dealloc {
[gameWord release];
[super dealloc];
}
@end
答
当然你的LetterLabel需要调用的UILabel的drawRect:在某些时候?
-(void)drawRect:(CGRect)rect {
// Your stuff goes here
[super drawRect: rect];
}
罪魁祸首是 - [super drawRect:rect]; – 2017-02-10 11:57:04