*自適應向布局約束的轉化關閉*/
#define PREPCONSTRAINTS(VIEW) [VIEW setTranslatesAutoresizingMaskIntoConstraints:NO]
#define CONSTRAIN(PARENT, VIEW, FORMAT) [PARENT addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:(FORMAT) options:0 metrics:nil views:NSDictionaryOfVariableBindings(VIEW)]] #define CONSTRAIN_VIEWS(PARENT, FORMAT, VIEWBINDINGS) [PARENT addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:(FORMAT) options:0 metrics:nil views:VIEWBINDINGS]] // Stretch across axis #define STRETCH_VIEW_H(PARENT, VIEW) CONSTRAIN(PARENT, VIEW, @"H:|["#VIEW"(>=0)]|") #define STRETCH_VIEW_V(PARENT, VIEW) CONSTRAIN(PARENT, VIEW, @"V:|["#VIEW"(>=0)]|") #define STRETCH_VIEW(PARENT, VIEW) {STRETCH_VIEW_H(PARENT, VIEW); STRETCH_VIEW_V(PARENT, VIEW);} // Center along axis 沿中心軸 /* *與父視圖中心軸水平方向對齊 */ #define CENTER_VIEW_H(PARENT, VIEW) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeCenterX multiplier:1.0f constant:0.0f]] /* *與父視圖中心軸垂直方向對齊 */ #define CENTER_VIEW_V(PARENT, VIEW) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeCenterY multiplier:1.0f constant:0.0f]] /* *以父視圖的中心點為視圖中心 */ #define CENTER_VIEW(PARENT, VIEW) {CENTER_VIEW_H(PARENT, VIEW); CENTER_VIEW_V(PARENT, VIEW);} /* *據里父視圖的中心點Y方向的距離 */ #define CENTER_VIEW_V_CONSTANT(PARENT, VIEW, CONSTANT) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeCenterY multiplier:1.0f constant:CONSTANT]] // Align to parent 與父視圖對齊 /* *和父視圖的左邊對齊 */ #define ALIGN_VIEW_LEFT(PARENT, VIEW) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeLeft multiplier:1.0f constant:0.0f]] /* *和父視圖的右邊對齊 */ #define ALIGN_VIEW_RIGHT(PARENT, VIEW) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeRight multiplier:1.0f constant:0.0f]] /* *和父視圖的頂部對齊 */ #define ALIGN_VIEW_TOP(PARENT, VIEW) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeTop multiplier:1.0f constant:0.0f]] /* *和父視圖的底部對齊 */ #define ALIGN_VIEW_BOTTOM(PARENT, VIEW) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeBottom multiplier:1.0f constant:0.0f]] /* *和父視圖的右邊距恒定不變 */ #define ALIGN_VIEW_LEFT_CONSTANT(PARENT, VIEW, CONSTANT) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeLeft multiplier:1.0f constant:CONSTANT]] /* *和父視圖的左邊距恒定不變 */ #define ALIGN_VIEW_RIGHT_CONSTANT(PARENT, VIEW, CONSTANT) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeRight multiplier:1.0f constant:CONSTANT]] /* *和父視圖的頂部距離恒定不變 */ #define ALIGN_VIEW_TOP_CONSTANT(PARENT, VIEW, CONSTANT) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeTop multiplier:1.0f constant:CONSTANT]] /* *和父視圖的底部距離恒定不變 */ #define ALIGN_VIEW_BOTTOM_CONSTANT(PARENT, VIEW, CONSTANT) [PARENT addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute: NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:PARENT attribute:NSLayoutAttributeBottom multiplier:1.0f constant:CONSTANT]] // Set Size 設置大小 #define CONSTRAIN_WIDTH(VIEW, WIDTH) CONSTRAIN(VIEW, VIEW, @"H:["#VIEW"(=="#WIDTH")]") #define CONSTRAIN_HEIGHT(VIEW, HEIGHT) CONSTRAIN(VIEW, VIEW, @"V:["#VIEW"(=="#HEIGHT")]") #define CONSTRAIN_SIZE(VIEW, HEIGHT, WIDTH) {CONSTRAIN_WIDTH(VIEW, WIDTH); CONSTRAIN_HEIGHT(VIEW, HEIGHT);} // Set Aspect #define CONSTRAIN_ASPECT(VIEW, ASPECT) [VIEW addConstraint:[NSLayoutConstraint constraintWithItem:VIEW attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:VIEW attribute:NSLayoutAttributeHeight multiplier:(ASPECT) constant:0.0f]]

轉載于:https://www.cnblogs.com/wskgjmhh/p/5235183.html

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