iOS Development Basics-fragmentation 24

<span id="Label3"></p><p><p><strong>1: compatible font size 6plue different from the following</strong></p></p><pre><pre><span style="color: #0000ff;">#define</span> Font_compatible_screen_offset (_fontsize_) [uifont systemfontofsize: (_fontsize_ * ([uiscreen MainScreen].scale) /2)]</pre></pre><p><p>In iphone4~6, the scaling factor scale=2; in iphone6+, the scaling factor scale=3</p></p><p><p>When Used:</p></p><pre><pre>Mylabel.font=font_compatible_screen_offset (<span style="color: #800080;"></span>a);</pre></pre><p><p>Extend: draw a single pixel of a macro</p></p><pre><pre><span style="color: #0000ff;">#define</span> Single_line_width (1/[uiscreen mainscreen].scale)<span style="color: #0000ff;">#define</span> single_line_adjust_offset ((1/[ UIScreen mainscreen].scale)/2)</pre></pre><p><p>When Used:</p></p><pre><pre><span style="color: #800080;">5</span> <span style="color: #000000;">; </span> <span style="color: #800080;">0</span> <span style="color: #800080;"></span>)];</pre></pre><p><p><strong>2: the<span class="s1">app virtual machine can run in the Real-computer debug times this issue because the product name is set to Chinese cause</span></strong></p></p><pre><pre><span style="color: #000000;"></span><span style="color: #0000ff;">Internal</span> <span style="color: #000000;">API Error. The product name of packaging in Build settings is set to Chinese</span></pre></pre><p><p><strong>3:xcode <span class="s1">certificate store path</span> </strong></p></p><pre><pre>Resource Pool/mobiledevice/provisioning Profiles</pre></pre><p><p><strong>4: <span class="s1">use Third-party rdvtabbarcontroller the bottom tab when you want to hide the animation off, there will be no flash of the situation</span></strong></p></p><pre><pre><span style="color: #008000;">//</span> <span style="color: #008000;">Hide Bottom menu</span> -(<span style="color: #0000ff;">void</span><span style="color: #000000;">) viewwillappear: (BOOL) animated { [super viewwillappear:animated]; [[self rdv_tabbarcontroller] Settabbarhidden:yes animated:no];}</span> -(<span style="color: #0000ff;">void</span><span style="color: #000000;">) viewwilldisappear: (BOOL) animated { [super viewwilldisappear:animated]; [[self rdv_tabbarcontroller] settabbarhidden:no animated:no];}</span></pre></pre><p><p><strong>5:<span class="s1">Masonry Some other content</span></strong></p></p><p class="p1"><p class="p1"><span class="s1">A:make.equalto or Make.greaterthanorequalto (up to) or Make.lessthanorequalto (at least)</span></p></p><pre><pre><span style="color: #000000;">make.left.greaterThanOrEqualTo (label); make.left.greaterThanOrEqualTo (label.mas_left);</span> <span style="color: #008000;">//</span> <span style="color: #008000;">width >= && width <=</span>make.width.greaterThanOrEqualTo (@<span style="color: #800080;"></span><span style="color: #000000;">); Make.width.lessThanOrEqualTo (@</span><span style="color: #800080;"></span>)</pre></pre><p class="p1"><p class="p1"><span class="s1">B:masequalto and Equalto differences: Masequalto is more than Equalto type conversion operations, generally speaking, most of the time two methods are common, but for numeric elements use Mas_equalto. For the handling of objects or multiple properties, use Equalto. In particular, multiple attributes must be used Equalto</span></p></p><p class="p1"><p class="p1"><span class="s1">C: Some simple assignment</span></p></p><pre><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;">make <span style="color: #008000;">top = superview.top + 5, left = superview.left + ten,</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">bottom = superview.bottom-15, right = superview.right-20</span></span>Make.edges.equalTo (superview). insets (uiedgeinsetsmake (<span style="color: #800080;"><span style="color: #800080;">5</span></span>,<span style="color: #800080;"><span style="color: #800080;">Ten</span></span>,<span style="color: #800080;"><span style="color: #800080;"></span> the</span>,<span style="color: #800080;"><span style="color: #800080;"></span> -</span><span style="color: #000000;"><span style="color: #000000;">))</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;">make <span style="color: #008000;">width and height greater than or equal to Titlelabel</span></span><span style="color: #000000;"><span style="color: #000000;">Make.size.greaterThanOrEqualTo (titlelabel)</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;">make <span style="color: #008000;">width = superview.width +, height = superview.height-50</span></span>Make.size.equalTo (superview). Sizeoffset (cgsizemake (<span style="color: #800080;"><span style="color: #800080;"></span> -</span>, -<span style="color: #800080;"><span style="color: #800080;"></span> -</span><span style="color: #000000;"><span style="color: #000000;">))</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;">make <span style="color: #008000;">CenterX = superview.centerx-5, centery = superview.centery +</span></span>Make.center.equalTo (superview). centeroffset (cgpointmake (-<span style="color: #800080;"><span style="color: #800080;">5</span></span>,<span style="color: #800080;"><span style="color: #800080;">Ten</span></span>))</pre><p><p>D:<span class="s1">use</span> of and keywords</p></p><pre><pre><span style="color: #000000;">Make.left.right.and.bottom.equalTo (superview); Make.top.equalTo (otherview);</span></pre></pre><p class="p1"><p class="p1"><span class="s1">E: priority; Priority (. Priority,.priorityhigh,.prioritymedium,.prioritylow)</span></p></p><pre><pre><span style="color: #000000;">'. priority ' allows you to specify an exact precedence '. Priorityhigh ' is equivalent to Uilayoutprioritydefaulthigh '. prioritymedium ' between high and low '. prioritylow ' Equivalent to Uilayoutprioritydefaultlow instance: make.left.greaterThanOrEqualTo (label.mas_left). with.prioritylow (); Make.top.equalTo (label.mas_top). with.priority (</span><span style="color: #800080;"></span>+);</pre></pre><p><p>G: <span class="s1">Once you have created constraint with mas_makeconstraints, you can use a local variable or property to save it for the next reference, and if you create multiple constraints, you can save them with an array</span></p></p><pre><pre><span style="color: #008000;">//</span> <span style="color: #008000;">local or global</span> @property (nonatomic, strong) masconstraint *<span style="color: #000000;">topconstraint;</span> <span style="color: #008000;">//</span> <span style="color: #008000;">Create a constraint and assign a value</span> [view1 mas_makeconstraints:^ (masconstraintmaker * make<span style="color: #000000;">) { </span>=<span style="color: #000000;"> make.top.equalTo (superview.mas_top). With.offset (padding.top); Make.left.equalTo (superview.mas_left). with.offset (padding.left);}];</span> <span style="color: #008000;">//</span> <span style="color: #008000;">Direct access to the Self.topconstraint after</span> [self.topconstraint uninstall];</pre></pre><p class="p1"><p class="p1"><span class="s1">H:mas_updateconstraints Update constraints, Sometimes you need to update constraint (for example, animation and Debugging) instead of creating a fixed constraint, you can use the Mas_updateconstraints method</span></p></p><pre><pre>-(<span style="color: #0000ff;">void</span><span style="color: #000000;">) updateconstraints { [self.growingbutton mas_updateconstraints:</span>^ (masconstraintmaker * make <span style="color: #000000;">) { Make.center.equalTo (self); Make.width.equalTo (@ (self.buttonSize.width)). prioritylow (); Make.height.equalTo (@ (self.buttonSize.height)). prioritylow (); Make.width.lessThanOrEqualTo (self); Make.height.lessThanOrEqualTo (self); }]; </span> <span style="color: #008000;">//</span> <span style="color: #008000;">Call Parent Updateconstraints</span> <span style="color: #000000;"> [super updateconstraints];}</span></pre></pre><p class="p1"><p class="p1"><span class="s1">I:mas_remakeconstraints update constraints, mas_remakeconstraints and mas_updateconstraints are similar, are updated Constraint. however, Mas_remakeconstraints is to delete the constraint before adding a new constraint (for mobile animations), and mas_updateconstraints just updates the value of Constraint.</span></p></p><pre><pre>-(<span style="color: #0000ff;">void</span><span style="color: #000000;">) changebuttonposition { [self.button mas_remakeconstraints:</span>^ (masconstraintmaker * <span style="color: #000000;"> Make) { make.size.equalTo (self.buttonsize); </span> <span style="color: #0000ff;">if</span> <span style="color: #000000;">(topleft) { make.top.and.left.offset (</span><span style="color: #800080;">ten</span><span style="color: #000000;">); </span> <span style="color: #0000ff;">Else</span> <span style="color: #000000;">{ Make.bottom.and.right.offset (</span>-<span style="color: #800080;">ten</span><span style="color: #000000;">); } }];}</span></pre></pre><p><p></p></p><p><p>iOS Development Basics-fragmentation 24</p></p></span>