重构代码时，遇到一个问题。设置label高度为20，动态计算高度为31.1，一直不能双行显示。
后来发现，前辈把addrHeight属性定义为int，系统给四舍五入了。改成CGFloat就好了。
#pragma mark 地址
- (UILabel *)addrLabel {
if (_addrLabel == nil) {
_addrLabel = [[UILabel alloc] init];
_addrLabel.backgroundColor = [UIColor clearColor];
_addrLabel.lineBreakMode = NSLineBreakByWordWrapping;
_addrLabel.numberOfLines = 0;
_addrLabel.font = [UIFont systemFontOfSize:13];
_addrLabel.textColor = [UIColor colorWithHexString:@"#393939"];
[self addSubview:_addrLabel];
}
return _addrLabel;
}
#pragma mark - 设置Frame
- (void)layoutSubviews {
[super layoutSubviews];
CGFloat addrHeight = 20;
CGFloat addrWidth = kWCScreenSize.width - 2 * kPace - kMargin - kImageWH;
UIFont *addrFont = [UIFont systemFontOfSize:13];
NSString *addrStr = _item.receiveaddress;
CGSize addrSize = [addrStr boundingRectWithSize:CGSizeMake(addrWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:addrFont} context:nil].size;
if (addrSize.height > 20) {
addrHeight = addrSize.height;
}
self.addrLabel.frame = CGRectMake(kMargin + kImageWH + kPace,
kMargin + self.nameImageView.bottom,
addrWidth,
addrHeight);
self.size = CGSizeMake(kWCScreenSize.width, self.addrLabel.bottom + kPace);
}
