iOS小技巧20-iOS UILabel 文字设置垂直居中、垂直靠上、垂直靠下，设置edgeInsets

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iOS小技巧20-iOS UILabel 文字设置垂直居中、垂直靠上、垂直靠下，设置edgeInsets

VerticalCenterTextLabel.h

#import <UIKit/UIKit.h>typedef enum : NSUInteger {    myVerticalAlignmentNone = 0,    myVerticalAlignmentCenter,    myVerticalAlignmentTop,    myVerticalAlignmentBottom} myVerticalAlignment;@interface VerticalCenterTextLabel : UILabel@property (nonatomic) UIEdgeInsets edgeInsets;/** *  对齐方式 */@property (nonatomic) myVerticalAlignment verticalAlignment;@end

VerticalCenterTextLabel.m

#import "VerticalCenterTextLabel.h"@implementation VerticalCenterTextLabel- (void)setVerticalAlignment:(myVerticalAlignment)verticalAlignment{    _verticalAlignment= verticalAlignment;    [self setNeedsDisplay];}- (void)drawTextInRect:(CGRect)rect{    if (_verticalAlignment == myVerticalAlignmentNone)    {        [super drawTextInRect:UIEdgeInsetsInsetRect(self.bounds, self.edgeInsets)];    }    else    {        CGRect textRect = [self textRectForBounds:UIEdgeInsetsInsetRect(rect, self.edgeInsets) limitedToNumberOfLines:self.numberOfLines];        [super drawTextInRect:textRect];    }}- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines{    CGRect textRect = [super textRectForBounds:bounds limitedToNumberOfLines:numberOfLines];    switch (_verticalAlignment) {        case myVerticalAlignmentTop:            textRect.origin.y = bounds.origin.y;            break;                    case myVerticalAlignmentBottom:            textRect.origin.y = bounds.origin.y + bounds.size.height - textRect.size.height;            break;                    case myVerticalAlignmentCenter:            textRect.origin.y = bounds.origin.y + (bounds.size.height - textRect.size.height) / 2.0;            break;                    default:            break;    }    return textRect;}@end

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