UITableViewHeaderFooterView的使用+自动布局

使用UITableView的header或footer复用时，如果采用自动布局，你会发现有约束冲突，下面这样写可以消除约束冲突：

#import <UIKit/UIKit.h>@interface SectionView : UITableViewHeaderFooterView@property (nonatomic, copy) NSString *sectionTitle;@end

#import "SectionView.h"@interface SectionView (){ UIImageView *titleBgImageView; UIImageView *timePonitImageView; UIImageView *circleImageView; UILabel *titleLabe;}@end@implementation SectionView// 带有复用- (instancetype)initWithReuseIdentifier:(NSString *)reuseIdentifier{ self = [super initWithReuseIdentifier:reuseIdentifier]; if (self) { [self createUI]; } return self;}- (void)createUI{ titleBgImageView = [[UIImageView alloc] initForAutoLayout]; titleBgImageView.userInteractionEnabled = NO; UIImage *image = [UIImage imageNamed:@"event_bottom_line"]; image = [image stretchableImageWithLeftCapWidth:image.size.width*0.5 topCapHeight:image.size.height*0.5]; titleBgImageView.image = image; [self.contentView addSubview:titleBgImageView]; circleImageView = [[UIImageView alloc] initForAutoLayout]; UIImage *circleImage = [UIImage imageNamed:@"event_blue1"]; circleImage = [circleImage stretchableImageWithLeftCapWidth:circleImage.size.width*0.5 topCapHeight:circleImage.size.height*0.5]; circleImageView.image = circleImage; [self.contentView addSubview:circleImageView]; timePonitImageView = [[UIImageView alloc] initForAutoLayout]; timePonitImageView.image = [UIImage imageNamed:@"event_write_line"]; [self.contentView addSubview:timePonitImageView]; titleLabe = [[UILabel alloc] initForAutoLayout]; titleLabe.font = [UIFont systemFontOfSize:13]; titleLabe.textColor = [UIColor whiteColor]; titleLabe.textAlignment = NSTextAlignmentCenter; [circleImageView addSubview:titleLabe]; }把布局代码写到这里- (void)layoutSubviews{ [super layoutSubviews]; [titleBgImageView autoPinEdgesToSuperviewEdgesWithInsets:UIEdgeInsetsMake(0, 0, 0, 0)]; [circleImageView autoPinEdgeToSuperviewEdge:ALEdgeLeading withInset:8]; [circleImageView autoPinEdgeToSuperviewEdge:ALEdgeTrailing withInset:8]; [circleImageView autoSetDimension:ALDimensionHeight toSize:23]; [circleImageView autoAlignAxisToSuperviewAxis:ALAxisHorizontal]; [timePonitImageView autoPinEdgeToSuperviewEdge:ALEdgeLeading withInset:16]; [timePonitImageView autoPinEdgeToSuperviewEdge:ALEdgeTop withInset:39/2.0-4]; [timePonitImageView autoSetDimensionsToSize:CGSizeMake(9, 23.5)]; [titleLabe autoCenterInSuperview]; [titleLabe autoSetDimension:ALDimensionWidth toSize:200]; }

怀着淡定从容的心态去面对，也就没有了真正意义上的寂寞了。

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