我有以下代码可以简单地将UILabel放置在自定义UITableViewCell
中。我要实现的是表格单元格左侧/右侧的标签边距为20。它应该是非常基本的,但是会使应用程序崩溃:
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
self.label = [[UILabel alloc] init];
self.label.translatesAutoresizingMaskIntoConstraints = false;
[self.label.leftAnchor constraintEqualToAnchor:self.contentView.leftAnchor constant:20].active = YES;
[self.label.rightAnchor constraintEqualToAnchor:self.contentView.rightAnchor constant:20].active = YES;
[self.label.topAnchor constraintEqualToAnchor:self.contentView.topAnchor constant:0].active = YES;
[self.label.bottomAnchor constraintEqualToAnchor:self.contentView.bottomAnchor constant:0].active = YES;
[self.contentView addSubview:self.label];
}
return self;
}
请帮助我弄清楚我在这里做错了什么。谢谢!
答案 0 :(得分:0)
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
self.label = [[UILabel alloc] init];
self.label.translatesAutoresizingMaskIntoConstraints = false;
[self.contentView addSubview:self.label];
[self.label.leftAnchor constraintEqualToAnchor:self.contentView.leftAnchor constant:20].active = YES;
[self.label.rightAnchor constraintEqualToAnchor:self.contentView.rightAnchor constant:20].active = YES;
[self.label.topAnchor constraintEqualToAnchor:self.contentView.topAnchor constant:0].active = YES;
[self.label.bottomAnchor constraintEqualToAnchor:self.contentView.bottomAnchor constant:0].active = YES;
}
return self;
}
这将起作用