UItableViewCell滑動刪除時，調整cell的位置大小是否顯示等。
CustomTableViewCell為UITableViewCell的子類，在實現文件中重寫willTransitionToState方法。
willTransitionToState是在cell改變顯示狀態的時候調用，有三種狀態：
typedef NS_OPTIONS(NSUInteger, UITableViewCellStateMask) {
UITableViewCellStateDefaultMask = 0, //普通狀態
UITableViewCellStateShowingEditControlMask = 1 << 0, //編輯狀態
UITableViewCellStateShowingDeleteConfirmationMask = 1 << 1 //刪除狀態
};
具體實現方法：

- (void) willTransitionToState:(UITableViewCellStateMask)state{[super willTransitionToState:state];//UITableViewCellStateShowingDeleteConfirmationMaskif ((state & UITableViewCellStateShowingDeleteConfirmationMask) == UITableViewCellStateShowingDeleteConfirmationMask) {for (UIView *subview in self.subviews) {if ([NSStringFromClass([subview class]) isEqualToString:@"UITableViewCellDeleteConfirmationControl"]) {//this is delete button}if ([NSStringFromClass([subview class]) isEqualToString:@"UITableViewCellContentView"]) {//this is contentViewfor (UIView *sub in subview.subviews) {if ([NSStringFromClass([sub class]) isEqualToString:@"UILabel"]) {UILabel *subLabel = (UILabel *)sub;if (subLabel.tag == 8) {subLabel.hidden = YES;}}if ([NSStringFromClass([sub class]) isEqualToString:@"UIImageView"]) {UILabel *subImageView = (UILabel *)sub;if (subImageView.tag == 11) {subImageView.hidden = YES;}}}}}}//UITableViewCellStateDefaultMaskif ((state & UITableViewCellStateShowingDeleteConfirmationMask) == UITableViewCellStateDefaultMask){for (UIView *subview in self.subviews) {if ([NSStringFromClass([subview class]) isEqualToString:@"UITableViewCellDeleteConfirmationControl"]) {//this is delete button}if ([NSStringFromClass([subview class]) isEqualToString:@"UITableViewCellContentView"]) {//this is contentViewfor (UIView *sub in subview.subviews) {if ([NSStringFromClass([sub class]) isEqualToString:@"UILabel"]) {UILabel *subLabel = (UILabel *)sub;if (subLabel.tag == 8) {subLabel.hidden = NO;}}if ([NSStringFromClass([sub class]) isEqualToString:@"UIImageView"]) {UILabel *subImageView = (UILabel *)sub;if (subImageView.tag == 11) {subImageView.hidden = NO;}}}}}} }

　　

轉載于:https://www.cnblogs.com/nanoCramer/p/3140255.html

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