iOS UIlable自定义lable 居上居左显示，

新建一个继承与UIlable的类如图：

创建myUILabel类

新建一个枚举表示（废话不说直接上代码）

typedef enum

{

VerticalAlignmentTop = 0,

VerticalAlignmentMiddle,

VerticalAlignmentBottom,

} VerticalAlignment;

#import "myUILabel.h"里面代码如下

#importtypedef enum

{

VerticalAlignmentTop = 0,

VerticalAlignmentMiddle,

VerticalAlignmentBottom,

} VerticalAlignment;

@interface myUILabel : UILabel{

@private

VerticalAlignment _verticalAlignment;

}

@property (nonatomic) VerticalAlignment verticalAlignment;

@end

#import "myUILabel.m"里面代码如下

#import "myUILabel.h"

@implementation myUILabel

@synthesize verticalAlignment = verticalAlignment_;

- (id)initWithFrame:(CGRect)frame {

if (self = [super initWithFrame:frame]) {

self.verticalAlignment = VerticalAlignmentMiddle;

}

return self;

}

- (void)setVerticalAlignment:(VerticalAlignment)verticalAlignment {

verticalAlignment_ = verticalAlignment;

[self setNeedsDisplay];

}

- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines {

CGRect textRect = [super textRectForBounds:bounds limitedToNumberOfLines:numberOfLines];

switch (self.verticalAlignment) {

case VerticalAlignmentTop:

textRect.origin.y = bounds.origin.y;

break;

case VerticalAlignmentBottom:

textRect.origin.y = bounds.origin.y + bounds.size.height - textRect.size.height;

break;

case VerticalAlignmentMiddle:

default:

textRect.origin.y = bounds.origin.y + (bounds.size.height - textRect.size.height) / 2.0;

}

return textRect;

}

-(void)drawTextInRect:(CGRect)requestedRect {

CGRect actualRect = [self textRectForBounds:requestedRect limitedToNumberOfLines:self.numberOfLines];

[super drawTextInRect:actualRect];

}

@end

在使用的时候只需要如下创建即可（[demoLable setVerticalAlignment:VerticalAlignmentTop];）

myUILabel*demoLable=[[myUILabel alloc]initWithFrame:CGRectMake(ScaleX(15), CGRectGetMaxY(lineView2.frame)+ScaleX(5),ScaleX(80), ScaleX(25) )];

[demoLable setVerticalAlignment:VerticalAlignmentTop];//让label居上显示

demoLable=[UIColor colorWithHexString:@"#666666"];

demoLable.textAlignment=NSTextAlignmentLeft;

demoLable.font=[UIFont systemFontOfSize:mytextfont];

demoLable.text=@"项目地址:";

//      AddressLable.backgroundColor=[UIColor purpleColor];

[self addSubview:demoLable];