dicetableviewcell's Introduction

DiceTableViewCell

A Parallax TableViewCell like the Dice app

Contained within the sample project is a table view which creates 10 cells. Build the app and scroll the table view you will notice the background image of each cell responding to the direction of the table views scroll motion.

The cell holds a background image which is inherently bigger than the cell height.

As the table view scrolls it post notifications of the direction of the scroll.

The cell responds to the notifications by adjusting the centre of the background image.

This is a very simple implementation with hard-coded #defines that dictate the speed of the parallax effect and hard-coded sizes of the cell and background images. All the images used in the demo are album art images.

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dicetableviewcell's Issues

Cannot satisfy all constraints

Encountered whilst running the demo project on the 'iPhone 6' simulator, iOS 8.1 (12B411)

2015-03-20 15:34:21.095 Dice[46096:2321889] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x7f9d8c114a80 H:[UIImageView:0x7f9d8c131610(320)]>",
    "<NSLayoutConstraint:0x7f9d8c13bed0 UITableViewCellContentView:0x7f9d8c13c730.trailingMargin == UIImageView:0x7f9d8c131610.trailing - 8>",
    "<NSLayoutConstraint:0x7f9d8c131260 UIImageView:0x7f9d8c131610.leading == UITableViewCellContentView:0x7f9d8c13c730.leadingMargin - 8>",
    "<NSLayoutConstraint:0x7f9d8c14d270 'UIView-Encapsulated-Layout-Width' H:[UITableViewCellContentView:0x7f9d8c13c730(375)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7f9d8c114a80 H:[UIImageView:0x7f9d8c131610(320)]>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2015-03-20 15:34:21.096 Dice[46096:2321889] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x7f9d8c148b50 H:[UIImageView:0x7f9d8c1488e0(320)]>",
    "<NSLayoutConstraint:0x7f9d8c148d90 UITableViewCellContentView:0x7f9d8c1487f0.trailingMargin == UIImageView:0x7f9d8c1488e0.trailing - 8>",
    "<NSLayoutConstraint:0x7f9d8c148e30 UIImageView:0x7f9d8c1488e0.leading == UITableViewCellContentView:0x7f9d8c1487f0.leadingMargin - 8>",
    "<NSLayoutConstraint:0x7f9d8c02bdf0 'UIView-Encapsulated-Layout-Width' H:[UITableViewCellContentView:0x7f9d8c1487f0(375)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7f9d8c148b50 H:[UIImageView:0x7f9d8c1488e0(320)]>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2015-03-20 15:34:21.233 Dice[46096:2321889] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x7f9d8c14f3f0 H:[UIImageView:0x7f9d8c14f1d0(320)]>",
    "<NSLayoutConstraint:0x7f9d8c14f630 UITableViewCellContentView:0x7f9d8c14f100.trailingMargin == UIImageView:0x7f9d8c14f1d0.trailing - 8>",
    "<NSLayoutConstraint:0x7f9d8c14f6d0 UIImageView:0x7f9d8c14f1d0.leading == UITableViewCellContentView:0x7f9d8c14f100.leadingMargin - 8>",
    "<NSLayoutConstraint:0x7f9d8ac135b0 'UIView-Encapsulated-Layout-Width' H:[UITableViewCellContentView:0x7f9d8c14f100(375)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7f9d8c14f3f0 H:[UIImageView:0x7f9d8c14f1d0(320)]>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2015-03-20 15:34:21.315 Dice[46096:2321889] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x7f9d8c155920 H:[UIImageView:0x7f9d8c1556b0(320)]>",
    "<NSLayoutConstraint:0x7f9d8c155b60 UITableViewCellContentView:0x7f9d8c1555c0.trailingMargin == UIImageView:0x7f9d8c1556b0.trailing - 8>",
    "<NSLayoutConstraint:0x7f9d8c155c00 UIImageView:0x7f9d8c1556b0.leading == UITableViewCellContentView:0x7f9d8c1555c0.leadingMargin - 8>",
    "<NSLayoutConstraint:0x7f9d8ac6f190 'UIView-Encapsulated-Layout-Width' H:[UITableViewCellContentView:0x7f9d8c1555c0(375)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7f9d8c155920 H:[UIImageView:0x7f9d8c1556b0(320)]>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2015-03-20 15:34:21.419 Dice[46096:2321889] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x7f9d8c15bfe0 H:[UIImageView:0x7f9d8c15bdc0(320)]>",
    "<NSLayoutConstraint:0x7f9d8c15c240 UITableViewCellContentView:0x7f9d8c15bcf0.trailingMargin == UIImageView:0x7f9d8c15bdc0.trailing - 8>",
    "<NSLayoutConstraint:0x7f9d8c15c2e0 UIImageView:0x7f9d8c15bdc0.leading == UITableViewCellContentView:0x7f9d8c15bcf0.leadingMargin - 8>",
    "<NSLayoutConstraint:0x7f9d8ad27e70 'UIView-Encapsulated-Layout-Width' H:[UITableViewCellContentView:0x7f9d8c15bcf0(375)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7f9d8c15bfe0 H:[UIImageView:0x7f9d8c15bdc0(320)]>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

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